Toxic waste dumped into the sea can make it hard for marine life to survive. Why is toxic waste dangerous to the ocean?
It can harm sea animals.
A blue whale travels thousands of kilometers searching for food in deep waters. Why does a blue whale swim such long distances?
To find something to eat.
Sea sponges stay in one spot and trap tiny food pieces that float past. How do sea sponges eat?
By catching food in water.