Question

1pt
One element on Earth is essential for most living things to breathe via respiration or make food via photosynthesis. Identify and classify this element.
A.
hydrogen, a metalloid
B.
hydrogen, a nonmetal
C.
oxygen, a metalloid
D.
oxygen, a nonmetal

Answer 1

The correct answer is:

D. oxygen, a nonmetal

Oxygen is essential for respiration in most living things and is also a key component in photosynthesis in plants. It is classified as a nonmetal.