Which of these organisms is a part of the group that produces all of the available energy in a food web?
a. fly
b. grass
c. mouse
d. sun

Answer metamorphic rock;

It is useful for historians to write narratives so that history can be passed on from their point of view.  think about a story being told in third person, then think about it again being told in first person, by someone who actually experienced the event.

Answerkolkata;

The correct answer is a)  a resource with a limited supply; it will run out.