Your lab partner Sam said since kelp are not plants, and they grow in water they cannot undergo photosynthesis. critique Sam's statement. Then construct an explanation reminding Sam of the role kelp plays in the cycling matter through the kelp forest organisms.
The cycle is:
Otter eats urchin
Urchin eats kelp
Kelp provides eating place and home for urchins
Kelp also helps otters stay afloat