a substance that moves across a cell membrane without using the cells energy tends to move? a.) away from the area of equilibriumb.) away from the area where it is less concentrated.c.) away from the area where it is more concentratedd.) toward the area where it is more concentrated

The correct option is C.) away from the area where it is more concentrated.

A substance that moves across a cell membrane without using the cells energy tends to move from an area of high concentration to an area of low concentration.

This is known as Passive transport. In this transport, substances move down the concentration gradient i.e from an area of high concentration to an area of low concentration. It is also called simple diffusion as no energy is required in this process.

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave