which of the following genetic elements can prevent the increase in gene expression that results from the presence of an enhancer sequence?

The genetic element is the insulator.

Explanation:

The insulator is a basic component of the eukaryotic genomes. In recent studies, insulators have been found in many eukaryotic cells ranging from yeast to human. These genetic elements can clog the enhancer-promoter communication and can also prevent the movement of repressive chromatin. They also can be used to restrict the actions of silencers and enhancers in the system. Insulators can also efficiently protect the gene expression from the negative and positive chromatin effects. Another important function of the insulator is to serve as a regulatory element and prevent genes from unnecessary regulatory interactions.