Answer:d. law of universal gravitation
Explanation:
B is correct. Krypton is a noble gas which has a full outer shell of 8 electrons and is generally unreactive because of it.

<h3>Choose the term that best matches the description given.</h3>
Cells that engulf and destroy bacteria _____.

Cells that engulf and destroy bacteria <u>phagocytes</u><u>.</u>
D. Man-Made is the answer