Monty is reading when he sees an insect land on the corner of his book. He then makes an eye movement to look at the insect, and then he swats at it to squash it. The structure of the visual system that is most likely responsible for making this eye movement and directing his reach is called the .

the superior colliculus                                

Explanation:

Superior colliculus: The term "superior colliculus" is also denoted as SC, and is described as a specific structure in an individual's midbrain i.e, one of the different parts of the brain and is considered as the part of "brain circuit" related to the sensory input transformation into an individual's movement output. The main function is associated with an organism including animal and human beings eye movements related to different subjects that falls into the outside world.

In the question above, the given statement represents the superior colliculus.