Animals depend on photosynthesis for food and oxygen.
Yes, but there would have to be some living breathing animals like us or the animal would starve and die then it wouldn't make oxygen and so would we.
Indirectly, yes. We humans eat plants; plants grow and generate energy by photosynthesis, so we need it. Or, we humans eat animals, and the animals eat plants, which use photosynthesis. At some level, our life depends on plants.
Whales are mammals, animals, and photosynthesis is not a property or activity of animals.
Why is photosynthesis essential to animals?
It doesn't, photosynthesis is purely for plants
Animals do not rely on photosynthesis - plants do. Animals cannot make their own food. That's why they can move around.
There are no animals that perform photosynthesis but there are a group of bacteria called cyanobacteria that rely partially on photosynthesis to generate metabolic energy.
Living things DO carry out photosynthesis, since green plants are living things. They are not animals, if that is what you meant. Animals do not have chlorophyll, which is needed for photosynthesis.
Oxygen is a product of photosynthesis that is used by plants and animals for respiration.
Planaria are type of animals. Animals are not photosynthetic
Animals benefit from photosynthesis by providing food rich in nutrients for the animals that eat plants (herbivores). Animals that eat other animals (carnivores) are indirectly benefitted, because they will then eat the animals that ate the plants.
Chlorophyll traps energy for photosynthesis and in photosynthesis oxygen is released that is used by animals for their respiration.