Final answer:
Infants prefer to look at objects with bold contrast and human faces, and they have a remarkable sense of smell and hearing, showing preferences for their mother's voice and scent.
Step-by-step explanation:
Infants show preferences in the stimuli they choose to look at. Among their visual preferences, infants have a particular interest in objects with bold contrast and human faces. While they have limited color perception at birth, they can often distinguish red within a few days after birth, with their ability to distinguish other colors improving quickly. They notably prefer looking at items that are shiny, have sharp contrasting colors, or possess complex patterns. Above all, an infant is inclined to look at human faces, which can be attributed to essential developmental processes as they interact with their caregivers and the world around them.
Newborns' sensory abilities also include their reactions to sound and smell. They show preferences for human voices, especially their mother's, over other sounds, and they display a remarkable sense of smell, being able to distinguish the scent of their own mother from others.