Protists represent an important evolutionary step between and A. fungi, plants B. bacteria, animals O C. single celled organisms, multicelled organisms D. plants, animals Peser Selection​

Protists are eukaryotic, mostly unicellular, and mostly aquatic. 'Eukaryotic' means that they have cells with a nucleus and membrane-bound organelles and are similar to the cells that make up our bodies. Because they are eukaryotic, protists fall within the domain Eukarya. Most protists are unicellular, meaning they are only made of one cell. However, some protists are multicellular and are made of more than one cell. Most are aquatic, meaning that they live in the water.

Explanation:

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its temperature is increasing. this causes molecular vibrations to increase.