Why is wood a renewable resource?

A) We use it over and over again.
B) It takes millions of years to replace.
C) Trees grow everywhere, so we always have some.
D) It can be replaced in a reasonable amount of time.

Trees grow everywhere, so we always have some

Explanation:

Wood is a renewable resource; trees can be replanted and grown to maturity in place of those that are cut down. As long as the trees are replanted at the same rate as they are cut down wood will be a renewable resource.

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.

the components of a vector are the parts of the vectors that are to each other.

b perpendicular