It'll boil? You can eat them
Answer:
Mechanical digestion
Chemical digestion
Explanation:
Food is physically broken into smaller parts. For instance, by chewing.
Food is broken down by acids and enzymes into its basic units.
Lichens use chemicals to break down rocks, which will turn into soil.
I can't see the question because it is blurry. I am sorry...
Answer:
Convection currents are the result of differential heating. Lighter (less dense), warm material rises while heavier (more dense) cool material sinks.