Which of the following terms means “a group of connected or related objects or materials”?

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.

i think its white blood cells

i hope this

the answer is z.

the human body has five levels of organization. level 1: cells. cells are the basic units of life and form the first level of organization. cells in the human body have specific functions. examples include nerve cells, blood cells, liver cells, and so on.