I think it’s a. 12
Explanation:if it’s wrong kill me
“Tell me if I’m right”
Answer:
B. Cartilaginous fish
Explanation:
Sharks have a cartilaginous skeleton. Cartilage is less dense than bone which allows sharks to move quickly through the water without using too much energy.
It is called hydrosphere
It is the total water in Earth.
Answer:
it think it C ^^^^^^^^^^^^