Molecules that bind to an enzyme away from the active site and increase the function of that active site are known as:

Explanation

The correct answer is allosteric activators. These molecules bind to an enzyme at a location other than the active site, known as the allosteric site. This binding causes a conformational shift in the enzyme's structure that improves the accessibility or functionality of the active site, thus increasing the enzyme's catalytic efficiency.The other options relate to different concepts: 'Activation energy without enzyme' and 'Activation energy with enzyme' are about the energy barriers in reactions; 'Energy of reactants' and 'Energy of product' describe the energy states of substances in a reaction, not the modulation of enzyme activity.