When she was only 4-months-old, Abigail's mother could drop her off at day care without Abigail crying or becoming upset. Once Abigail turned 8 months, she began clinging to her mother, crying, and becoming very upset when her mother dropped her off. What concept explains Abigail's behavior?

object performance

Explanation:

The term "object permanence" is used to describe a child's ability to know that objects continue to exist even though they can no longer be seen or heard. It means her mother still exist even though she doesnt see her all the time.it requires the ability to form a mental representation

it was known as the aztec empire. the capital was formally named tenochtitlan. *hope this .

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jefferson hoped to establish trade with the native american people of the west and find a water route to the pacific. jefferson also was fascinated by the prospect of what could be learned about the geography of the west, the lives and languages of the native americans, the plants and animals, the soil, the rocks, the weather, and how they differed from those in the east.