select the best response based on that data.

Question

a
By mass, humans are mostly oxygen.
b
By volume, humans are 10% hydrogen.
c
Elements making up the human body are worth about $600.
d
Humans are mostly water.

Answer 1

The best response is:

d. Humans are mostly water.

This statement is widely accepted as accurate, as the human body is made up of approximately 60% water by weight.