The answer is A. flattened maxilla.
Answer:
Explanation:
The materials that are useful are bamboo, plastic, steel, concrete, fabric , textiles, stones, brick, repurposed wood e.t.c.
Materials become useful, when those that uses it use it right and to achieve a specific purposes base on the properties the materials poseses.
The materials that are harmful include asbestos, Mercury containing devices, lead based paints, household hazardous waste, light system, mold, refrigerant containing system.
Materials become harmful when they contain substances or properties that is dangerous or can harm human beings and cause damage to cells.
<span>Cellulose is a lot stronger than starch. Starch is practically
useless
as a material, but celluose is strong enough to make fibers from, and
hence rope, clothing, etc. Cellulose doesn't dissolve in water the way
starch will, and doesn't break down as easily.
</span>Your body contains
enzymes that break starch down into glucose to fuel your body. But
we humans don't have enzymes that can break down cellulose.
