An example of an element is:

A) iron.
B) carbon.
C) oxygen.
D) all of the above.

D) all of the above.

Health Professions

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What are three components of heating, ventilating, and air-conditioning (HVAC) systems?

What will be an ideal response?

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The ________ controls most activity in the endocrine system

Fill in the blank with correct word.

Health Professions