Systems in nature tend to undergo changes explain your answer.
1. lower energy and lower entropy.
2. lower energy and higher entropy.
3. higher energy and lower entropy .
4. higher energy and higher entropy.

The correct answer is option 2. Systems, by nature, tend to undergo changes toward higher entropy and lower energy since this is the state where they are most stable. Entropy is the degree of disorderliness of a substance. Systems tend to go to higher disorder since systems always tend to change which can be linked to disorder and is inevitable.

a. are

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

hope this ! : )