Answer no 1:
Shark obtains energy by feeding on smaller fishes.
An organim that feed on another organism is termed as a predator. The organism that is being attacked by the predator for food is termed as prey
Answer no 2:
Abiotic factors: The water and salts in it.
Living organisms: Ocellaris clownfish, Sharks, Octupus
Biotic factors are the living factors of an ecosystem whereas non- biotic factors are the non- living factors.
Answer No 3:
Commensalism: The crown fish have a colour similar to plants like anemone. The anemone do not benefir from the crown fish but the crown fish gets protected by predators by hiding in the anemone plants.
Mutualistic: The decorator crabs take sponges from the water and stick to them to their bodies. As the colour of the sponges is similar to crabs, it lets them hide from predators. The sponges in return take food from the crabs.
Parasitic: The sea urchin lives inside a coral and eat their food which is algae. The corals die due t lack of food.