Question

which is a characteristic of all living things they respond to stimuli they are multicelluar they are unicellular need water

Explanation:

Living things need water for various metabolic processes like digestion, circulation, and maintaining cell - turgor. Not all living things are multicellular (e.g., bacteria are unicellular), and not all are unicellular (e.g., animals are multicellular). While living things can respond to stimuli, the most fundamental and universal characteristic among the options is the need for water.

Answer:

they need water