The choice between "deren" and "dessen" depends on the gender and case of the noun they are referring to. "Deren" is used for feminine and plural nouns in the genitive case, while "dessen" is used for masculine and neuter nouns in the genitive case. It is important to match the gender and case of the noun when choosing between "deren" and "dessen" in German grammar. **

The pronoun "deren" is used in German to indicate possession or relationship, similar to the English "whose." It is used to refer to a plural noun in the genitive case, indicating that something belongs to or is associated with the noun. For example, "Das sind die Kinder, deren Eltern im Urlaub sind" (These are the children whose parents are on vacation). "Deren" is used to show the relationship between the children and their parents. **

The correct form is "deren." This is the genitive and dative plural form of the relative pronoun "die," which means "who" or "whose" in English. It is used to indicate possession or association with a plural noun. The form "derer" is an older, more formal version of "deren," but "deren" is the more commonly used form in modern German. **

Both "an ihrer Stelle" and "an deren Stelle" are correct, but they are used in different contexts. "An ihrer Stelle" is used when referring to a female person or a group of female people, while "an deren Stelle" is used when referring to a neutral or mixed-gender group of people. It's important to match the gender and number of the pronoun with the noun it is referring to in order to use the correct form. **

"Dessen" is used to refer to a masculine or neuter noun in the genitive case, while "deren" is used to refer to a feminine or plural noun in the genitive case. For example, "Das ist das Auto, dessen Farbe mir gefällt" (This is the car whose color I like) uses "dessen" because "Auto" is neuter. On the other hand, "Das ist die Frau, deren Hund entlaufen ist" (This is the woman whose dog has run away) uses "deren" because "Frau" is feminine. **

Denen, ihnen, ihren, and deren are all pronouns used to refer to people or things in the third person plural. "Denen" is used as the dative plural form of "die" (those), "ihnen" is used as the dative or accusative plural form of "sie" (they), "ihren" is the possessive form of "sie" (their), and "deren" is the possessive form of "die" (whose). The difference lies in the grammatical case and the gender of the noun being referred to. "Denen" and "ihnen" are used to refer to the object of a sentence, while "ihren" and "deren" are used to show possession. **

It is difficult to predict with certainty whether there will soon be no more winters with snow, ice, and frost. However, climate change is leading to rising global temperatures, which can result in milder winters and reduced snow and ice cover in some regions. While some areas may experience less frequent and intense winter weather, others may still continue to have traditional winter conditions. It is important to continue monitoring and addressing climate change to better understand its impact on winter weather patterns. **

We use "denen" when referring to plural objects or people, "ihnen" when referring to plural indirect objects, "ihren" when referring to plural possessive pronouns, and "deren" when referring to plural possessive pronouns in a relative clause. The difference lies in the grammatical function each word serves in a sentence: "denen" is used as a relative pronoun, "ihnen" as a dative pronoun, "ihren" as a possessive pronoun, and "deren" as a genitive relative pronoun. **