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.
Coral reefs are the world's most diverse ecosystems. imagine how many species of creatures will go extinct due to human fault.
Answer:
The reactions that occur when acid rain hits a brick building
Explanation:
The passage mentions what a biochemical process is, biochemistry combines chemistry and biology. With this alone, we know that acid rain is apart of biology, and the reaction is has on a building is chemistry.
Ocean tides are caused by the gravitation of the Moon. Currents can be
formed by the flow of tidal water around the continental plates, or by a
difference in water temperature between large ocean areas. Surface
waves are caused by the wind. Abnormal waves can be created by the
tectonic movement of plates around and under the ocean floor (tsunamis).
So as you can see, the answer is (C) Gravity
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Statement 3 is the best choice
