Directions: In each of the following sentences, a sentence is given with certain words in bold. Choose the pair/s of such words which need to be interchanged so as to make the sentence grammatically correct and meaningful.

Expanding agriculture by cutting(A) down forests has variants(B) food volumes, and mining feeds many industries, but these have severely(C) affected other functions such as water availability, pollination, maintenance of wild raised(D) of domesticated plants, and climate regulation.