Question

sponges are sessile, meaning that they dont move for most of their life. the only time they do is when theyre eating right before they reproduce right before they die when theyre larvae (babies) sponges are covered in small holes (the namesake of phylum porifera) called osculum pores choanocytes amoebocytes

Explanation:

Sponges are sessile as adults but their larvae can move to find a suitable place to settle. The small holes covering sponges are called pores, which is why they are in the phylum Porifera.

Answer:

1. D. when they're larvae (babies)
2. B. pores