What is the term for play in which children manipulate objects to produce or build something?

In which of Piaget's stages does the child develop conservation?

a. sensorimotor b. preoperational c. formal operational d. concrete operational e. postformal operational

Michelle is online looking for a date to an upcoming event. She notices one very attractive individual who has posted interest in attending the event as well

She thinks he is likely to be very sociable, but her roommate who is from Korea thinks he will also be a good match because he will be a. generous. b. very smart. c. strong. d. assertive.