Answer:
The first one
When pulling a tree from the ground
Answer:
plasma membranes, cytoplasm, ribosomes, and DNA
Explanation:
Food webs show the flow of energy (stored as organic molecules) through ecosystems. Thus, a scientist would use a food web to show the flow of energy through an ecosystem.
Surface waves move slower but have much more power and are more destructive if I remember right.
B. any material supplied by the environment that humans use
