With repeated presentations of a bright red toy, 2-month-old anita began to respond with less visual attention to the toy. her decreasing responsiveness best illustrates

The development of sharper visual acuity.

Explanation:

At one week after birth, they can see red, orange, yellow and green. However, babies see red as the first primary color.

Many advances in vision development take place in months two and three. Infants develop sharper visual acuity during this period, and their eyes are beginning to move better as a team. A child should be following moving objects at this stage and starting to reach for things he sees.