B) wavelength
Notice how Z goes from one wave's crest (top) to another's crest. Wavelength can also be measured from a wave's trough (bottom) to the next one's trough.
Answer:
2. Direct, 3. 1 2 and 3 I couldn't find 1 srry. :)
Explanation:
Answer:
C.
It controls the entry and exit of substances.
Because types of chemicals in minerals need to form.
