Population growth is not restricted by Increased predation
Increased birth rate
Increased death rate
(there may be more than one correct answer)

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme

i might be wrong but i think its a. let me know if i’m right and have a good rest of your day!