To find food and a habitat, organisms must have motility. Motility is defined as the ability to be mobile, moving spontaneously, and using energy to do so. This means that the organism is not simply floating in the water or being swept along by the wind. Instead, they are actively moving - using flagella, cillia, legs, etc. to do it. If an organism cannot move of its own accord,
it is going to have a lot of trouble finding food or a home if something happens where it currently lives.Motility is also what allows organisms to find water and mates. Water is essential to every living creature, so if they cannot move on their own, this is going to be a problem they’ll have to solve in another fashion. If they can’t move to mate, they may reproduce asexually.
