What molecules
does a body need to
stay healthy? How do
they enter your
body?

that's a rhetorical question

Explanation:

90% of the human body is composed of just four elements. They are carbon, hydrogen, oxygen, and nitrogen. These elements combine to larger units called molecules. There are two types of molecules in our bodies; organic and inorganic.

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.