Acatalyst is a chemical:

found in leaves
which promotes a chemical reaction
which reacts with sunlight
produced by the chloroplast

A catalyst is a chemical ,which promotes a chemical reaction.

Explanation:

A catalyst is a substance which speeds up a reaction without it being changed at the end of the reaction. Each reaction normally needs a specific amount of energy i.e. activation energy . The role of catalyst is to reduce that activation energy needed for a reaction occur.

just did the assignment and the answer was #1 +2 n

b. accuracy of the data matters alot more than its number of digits, organization or amount of detail. quantitative observation is more accepted than the qualitative observation.