Which substage of sensorimotor development is characterized by coordination of vision and touch— hand-eye coordination?

4th Substage of sensorimotor stage.

Explanation:

The sensorimotor stage consists of total six stages also known as the Piaget's Stages of Cognitive Development. These stages include the corrdination, physical development and mental development of any individual.  

The vision, touch and coordination is involved in the 4th Substage of sensorimotor stage. The scheme and intentionality might also develop in this stage. The infant might manipulates the stick in the order to makes the attractive toy to his reach.

Thus, the answer is 4th Substage of sensorimotor stage.

b. the carbon cycle ensures living things have a source of hydrogen

answer; endometriosis;