Martha bought a six pack of soda on Thursday. She promised her neighbor, Mr. Jimmy, that she would save the cans for him. What are they doing to help our ecosystem?

They are potentially reducing and reusing, if he intends to do something with the cans.

Explanation:

1. Reducing by saving cans

2. Might reuse the cans for something like art maybe, reusing

"a scientist studying a whale and its surroundings would need to understand the structure of atoms in case something was negatively affecting the whale or its surroundings."

explanation:

this was from the link provided:

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.