Enzymes
a catalyst is a substance that increases the rate of a chemical reaction but is not consumed by the reaction. Enyzymes are <span>Biological catalysts that increase the rate of a chemical reaction but is not consumed by the reaction. There are variosu types of enzymes depending on the reaction process. Usually enzymes are named after the reaction they catalyzed.</span>
When solving problems, a child in the concrete operational stage is able to apply <u>logical thinking </u>but is generally not yet able to apply <u>abstract</u><u> </u><u>reasoning</u>.
<h3>What is Logical thinking?</h3>
Logical thinking is the ability of a person to base one's inferences and deductions on facts rather than assumptions.
It is a disciplined manner of thinking. Abstract reasoning on the other hand is the ability to apply logical thinking to ideas that are beyond that which can be readily observed.
Learn more about Logical Thinking at:
brainly.com/question/24487384
I think D is the correct with my explanation