Which is the best definition of diffusion? question 1 options: movement of molecules from an area of their higher concentration to an area of their lower concentration movement of water across a semipermeable membrane from an area of high water concentration to an area of lower water concentration movement of molecules from an area of their lower concentration to an area of their higher concentration movement of water across a semipermeable membrane from an area of low water concentration to an area of higher water concentration movement of a substance against its concentration through the release of energy from atp?

The answer is very simple. Diffusion is a process that produces a flow of material (molecules) from an area of higher concentration to an area of lower concentration. This process is very important because life depends on it. In our body many processes depend on it. For example, during digestion the food that has already been broken down by the digestive acids is concentrated in the stomach, then it moves down to a less concentrated area in the intestines. This example helps you to understand the behavior of matter specially in liquids and gases.

Explanation:

Now, a better explanation of this comes in the cells of every living creature. When you study the cell closer,  you will see how diffusion allows the cell to move proteins in and out of the membrane depending on the need at a particular moment.

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.