Alaskan natives often eat whale blubber while other groups of people typically do not. this is an example of a. food variety b. stress c. palpability d. learned preferences

This is an example of Learned preferences.

Explanation:

Alaskan natives are divided into five major groups viz: aleuts, southern eskimos, northern eskimos, interior indians and coastal indians. Although the five groups all have similar ethnic similarities, they occupy different geographical locations in Alaska. The alaska natives have overtime had to adapt to certain conditions largely because of their environment.

it would be c. predictability

prndulum needs thread, weight clock to time swings