Passive transport involves movement of substances A. from areas of lower concentration to areas of higher concentration.

B. from areas of higher concentration to areas of lower concentration.

C. from areas in which the concentration has reached a balance.

D. from areas of differing concentrations with the use of cellular energy.

Passive transport involves movement of substances from areas of higher concentration to areas of lower concentration.

Explanation:

Passive transport involves the passage of substances through a semi-permeable membrane, as occurs with transport at the level of cell membranes.

Generally, passive transport occurs with the movement of compounds from the space with the highest concentration of a specific substance to the space with the lowest concentration of the same substance, following the so-called concentration gradient. Theoretically, the gradient tends to disappear when the concentrations of substances have balanced out.

Regarding other options:

    A. From areas of lower concentration to areas of higher concentration.  It is a feature of active transport.

     C. From areas in which the concentration has reached a balance.  There is no passive transport

     D. From areas of differing concentrations with the use of cellular energy.  Energy use involves active transport.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.