After reviewing the graphic, select the best response based on that data shown.

Question

a
Humans are composed primarily of water.
b
By mass, humans are 2% calcium.
c
By volume, humans are 65% oxygen gas.
d
Elements making up the human body are mostly potassium and carbon.

Answer 1

The best response based on general knowledge about human composition is:

a. Humans are composed primarily of water.

This statement accurately reflects that the human body is comprised of about 60% water by weight. The other options contain inaccuracies or are misleading regarding the elemental composition of the human body.