What is the question?? I’m confused let me know
Here, you would need to add the preposition "in."
The sentence should read: My elder sister is really interested in the problems of the environment.
Other prepositions would not make sense and could confuse the reader as to the intended meaning.
Explanation:
Option B is the correct answer
Um i think your forgot to add part of the question
14.D this is the best answer
As to number 13 I cannot answer because I don’t know anything about their interaction
