____ has been used by many traditional cultures as a method of prenatal care and is now in vogue with many midwives, nurses, and physicians in developed countries

The theory of infant language development that holds that communication with others is the crucial element is referred to as the ______ theory

Fill in the blank with correct word

When you look directly at an object, the image of the object focuses on a spot where many receptor cells called cones are packed together. This spot, which also gives us our sharpest vision, is the _____

a) retina. b) ganglion. c) fovea. d) blind spot.