Answer:
The name “amino acid” is derived from the amino group and carboxyl-acid-group in their basic structure.
Explanation:
The micro organisms are found in
<em><u>hot springs
</u></em><em><u>soil
</u></em><em><u>snowfield
beneath earth
rocks
inside roots
swamps
water...
</u></em>
A makes the most sense, though D could actually be an Ok reason, the other two aren't reasonable, a fire safety action? The door would be better open in a fire emergancy, it makes a quicker escape