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Passive transport is the movement of molecules across a membrane without the use of energy. What cause the molecules to move?

1. Molecules move inside a cell to interact with organelles
2. Molecules move across a membrane to reach other cells
3. Molecules move from an area of relatively high concentration to an area of lower concentration
4. Molecules move from an area of relatively low concentration to an area of higher concentration

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The cause of molecules moving without energy is because molecules move from an area of relatively high concentration to an area of lower concentration. The correct option is 3.

What is passive transport?

The transport of molecules and ions happens in every cell through a membrane. These transports are of two types, active transport, and passive transport.

Passive transport is when molecules move from a high concentration region to a lower concentration region, so there are many high concentrations of molecules, which creates pressure, and the molecules move without energy.

Thus, the correct option is 3. Molecules move from an area of relatively high concentration to an area of lower concentration.

Learn more about passive transport, here:

https://brainly.com/question/13542102

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