A lab observation notes that a sponge lacks a digestive cavity, so food particles are processed inside cells. The observation points to:

Correct Answer: A

intracellular digestion

Sponges digest food intracellularly after particles are captured by choanocytes or transferred to archaeocytes. This matches their simple body organization and absence of a true gut. This MCQ belongs to the Porifera topic in Animal Diversity-I and is written to test concept understanding rather than memorized wording.