The museum is submitting proposals to several foundations in the hope to gain(Option D) funds to build a tropical butterfly conservatory.
Sentence correction or sentence improvement is a type of grammatical practice where a sentence is given with a word or a phrase that requires grammatical changes or improvement.
Now, here, "to gain" is idiomatically incorrect over here. Thus, Option D is the part in the sentence where there is a fault and a correction needs to be made.
To learn more about sentence correction, refer to the link: https://brainly.com/question/14632568
#SPJ4