Read the sentences.

Question

The Arctic region, where winters are long and cold, is home to more than 400 species of flowering plants.

Which group of words is an adjective clause in the sentence?

A) is home to more than 400 species of flowering plants
B) of flowering plants
C) where winters are long and cold***
D) The Arctic region, where winters are long and cold

If it is C why isn't it D?

Answer 1

C is right. That clause modifies the subject, "The Arctic region."