a long-bodied chiefly marine fish with a cartilaginous skeleton, a prominent dorsal fin, and tooth-like scales. Most sharks are predatory, though the largest kinds feed on plankton, and some can grow to a large size.
a colorless, odorless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air.
aware of and responding to one's surroundings.
join or fasten (something) to something else.
an expert swimmer employed to rescue bathers who get into difficulty at a beach or swimming pool.
A park ranger
a person entrusted with protecting and preserving national, state, provincial, or local parks.