Answer:
Holding the head up. Infancy is a period when the baby grows very fast. During infancy, the baby doubles in length and triples in weight. Other important changes also happen during infancy: ... The baby starts smiling, paying attention to other people, and grabbing toys.
Both stimulants and depressants can be D. all of the above.
Both stimulants and depressants are addictive drugs; while stimulants generally speed up the body's processes, depressants slow them down. These drugs can be abused and have fatal consequences.
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Increases the rate of ventilation and dilates the bronchi and alveoli