Diamond is not a rock it is a mineral.
Answer:
If this related to science, then you would add a catalyst to speed up a reaction.
Explanation:
The definition of a catalyst is: "a substance that causes or accelerates a chemical reaction without itself being affected".
Examples of this include the enzymes in our stomach acid that aid in digestion.
The correct answer is A
hope this helps :)
Answer:
A wheel and axle is a simple lifting machine that consists if rope that unwind a wheel onto a cylindrical drum/ shaft to provide mechanical advantage.
