Q: What  occurs when substances move from areas of lower to higher concentration or when very large molecules are transported?


Read this paragraph and choose the correct option from the provided answers:

Active transport requires energy from the cell. It occurs when substances move from areas of lower to higher concentration or when very large molecules are transported. Types of active transport include ion pumps, such as the sodium-potassium pump, and vesicle transport, which includes endocytosis and exocytosis.

 Choices:

- migration

- diffusion

- passive transport

- active transport


A:
active transport