Final answer:
Sea squirt's body cells are involved in filtering food from moving water, utilizing the pharyngeal slits and cilia to trap and ingest food particles.
Step-by-step explanation:
What is likely true about the sea squirt's body cells? Among the options provided, the most fitting description of the function of sea squirt's body cells is that they help in filtering food from the moving water (option 1). Sea squirts, like sponges, are filter feeders and use a similar method to feed. Water enters the sea squirt's body through an incurrent siphon, and food particles are trapped by a mucus net within the pharyngeal slits. Aided by cilia, the filtered food is then moved into the intestine.
Thus, option 1 is the most accurate regarding the sea squirt's body cells.