It is a contributing factor in the increase of single-parent families in north america.

a. an increasing divorce rate.
b. a decrease in the number of individuals who never marry.
c. an increase in polygamy.
d. a decrease in the number of individuals who remain childless.

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