Answer: D just took the test
Explanation:
<span>They are Carbohydrates.</span>
Calcium provides strength as a element, though it is present as calcium chloride on the exoskeletons.
<span>Here are the choices:
a.
using solar power
b.
recycling glass
c.
using nuclear power
d.
using biofuels
The answer is b. Recycling glass. It is not included in resource conservation since it is not coming from the natural resources. </span>
