When a player slides into second base, what aspect of Newton's first law of motion does
this illustrate?
A. An object at rest staying at rest.
B. Friction as an unbalanced force.
C. Gravity as an unbalanced force.

cell differentiation  is how generic embryonic  cells  become specialized  cells. this occurs  through a process called gene expression. gene expression is the specific combination of genes that are turned on or off (expressed or repressed), and this is what dictates how a  cell  functions.

explanation:

c) up is the direction the magnetic force is acting on the charge.

your answer is, orbit around the nucleus

i would say