Which cell organelle forms an outside covering that allows things in and out? Group of answer choices

A. Cell Membrane

D. Mitochondria

C. Cytoplasm

E. Cell Wall

B. Nucleus

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.

it's c. elements are placed in rows based on how may valencies electrons have.

have a great day because if you dont you and i will be sad