Structure of the universe, telescope and microscope
I would put option A.
The question says how the surface MIGHT change over a long period of time so that's why I wouldn't say option C, and that's how canyons are formed if I'm not mistaken.
I hope this helps. My apologies if I'm wrong.
<span>It is important to protect our shores for environmental reasons. Just past the shores are grasses that provide habitat for birds and other animals. The shoreline is part of the ecosystem and disrupting vegetation throws the environment out of balance. In addition, the shoreline needs to be preserved to sustain economic vitality. Homes and businesses are often just past the shoreline. Without protection, an eroded shoreline will lower property values.</span>
Answer:
the scientist is studying the ecosystem
Explanation:
