Jack typically wears bland, neutral clothes to avoid drawing attention to himself. Which of the following does this illustrate?

During early childhood, children's body proportions change. Their heads become ________ compared to the rest of their bodies

Fill in the blanks with correct word

Which action is most difficult to classify as classical or operant conditioning?

a. pressing a lever to get food b. pressing a lever to escape shock c. salivating after a sound previously paired with food d. song learning by male birds