Answer:
Autotrophs
Explanation:
Ex. Plants (Autotrophs) gain energy from the sun and turn it into and produce oxygen (Chemical energy)
It's biohazard. Also if it's flammable the symbol will show a flame and if it's corrosive it'll show a image with a hand being dissolved or like a spot missing by a liquid being dropped from a tube
A.basic,bcoz if ph level increases its basic
Nature increases
