Which of the following is necessary to create a state of flow? a) clear short term goals

b) internal motivation

c) immediate feedback

d) all of the above

I'm not sure but i think the b number is the best

Explanation:

in my opinion the internal motivation is necessary

d) all of the above

Explanation:

To be in a state of flow, means to feel 'in the zone' or completely engaged in something. Clear goals, motivation, and quick feedback all can help with being in a state of flow.

antibodies

explanation:

answer(b) keep oxygenated and deoxygenated blood separate;