Answer:
Active Voice : The poachers are killing the wild animals.
Passive Voice : The wild animals are being killed by the poachers.
A singular verb would be used with a singular noun (she, Bob, Jane, truck) while a plural verb would be used with a plural noun (they, cars, books).
For example "The truck drives away." Truck being a singular noun and drives being a singular verb.
Another example
"The cars drive away." cars being a plural noun and drive being the plural verb.
B) Sentence (1) in my opinion. It immediately states the point, and it tell you what the paragraph will be about.
Since I cant type just one letter, I believe the answer you are searching for is "A"
Like a dialogue between two people or?