Euglena, one of the most common flagellated protozoa, has a red eyespot which is important for

Euglena, one of the most common flagellated protozoa, has a red eyespot which is important for detecting light. The eye spot is located in the gullet, at the base of the flagellum. This light sensitive region influences the flagellar motion in such a way that Euglena moves toward light. 

Region b indicates the occipital lobe

Then it is june the conclusion to the second sentence is just restating "if it is june then it is summer"