Question

multiple - choice question
of the 20 amino acids, 9 of them are essential amino acids. what does this mean?
they are the 9 most commonly used of the 20 amino acids.
your body can not make them, so you need to eat foods that contain those 9 (example: red meat)
rewatch

Explanation:

Essential amino - acids are those that the human body cannot synthesize on its own. So, dietary intake of foods containing these amino - acids is necessary.

Answer:

Your body can not make them, so you need to eat foods that contain those 9 (example: red meat)