Answer:
It has many predators in the ocean.
Explanation:
Animals adapt to their environment because of their predators.
All arthropods Have Exoskeletons . Hope I helped
Because these smaller cells can access and pass through the membranes of the other cell membranes and permeable coverings easily and voluntarily unlike larger cells. It is also for efficient for these smaller and miniscule cells to penetrate and travel, delivering and transporting goods and materials such as nutrients, oxygen and waste throughout the body without consuming enough energy and conserving lesser space.
For simple reasons, they are faster, more efficient and consumes little space, and most especially depletes lesser energy.
The one that is true is the last one that you listed
