During the client consultation, Marcus mentions that he is currently under the care of a neurologist. Marcus is most likely being treated for an injury or disorder involving his system.

nervous system

Explanation: I just did it

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.

the answer should be in the picture.