It would be A because plants use photosynthesis to make proteins and fats to kind of survive
Answer:
D 2 million years is the answer
Explanation:
Deer populations would drop as the wolves would hunt more
I would say B.
A, umm, don't crash trains, that's bad.
C, Lillian is wondering how fast a train can go, not at what curve will it fall.
D, Lillian isn't wondering about the size of the trains, just the speed.