Mastication is just a fancy way to say chewing. Since nothing chemical is going on and the food is just being chewed, the answer is physical.
Answer:
Cells connect together to form a battery
Explanation
Another element that is important to bones is calcium
14. It would indirect and 15. Direct
-- Like Fungi, fungus-like protists are heterotrophs, Absorbing their food energy from their environment (Often from decaying organisms) Have cell walls and use spores to reproduce.
--The three types of fungus-like protists are Slime molds, Water molds and downy mildews.
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