<h2>
Answer:</h2>
<u>reactants, </u> <u>products</u>
<u>catalyst</u>
<u>activation energy</u>
<u>enzymes</u>
<h2>
Explanation:</h2>
Chemical reactions convert <u>reactants</u> to <u>products</u>. In nonliving systems, the presence of a(n) <u>catalyst </u>allows the reaction to proceed very quickly and have a lower <u>activation energy</u>. In living systems, this function is carried out by proteins called <u>enzymes</u>.
Answer:
This is complex
Explanation:
I recommend asking teacher for help and please don't ever my answers
D. Made of ash and pieces of rock rich in silica.
Should be your answer!