How long has Earth been in its current era? A. 1.8 million years
B. 65 million years
C. 5 billion years
D. 200,000 years

Science A P E X

none of the above its actually 3 million years.

Explanation:

protein makes up the building blocks of organs, muscles, skin, hormones and pretty much everything that matters in your body.

some choices are:

peanut butter

seeds

eggs

yogurt

meats

fish

so pretty much meat, dairy, nuts, and grains.