Answer:
hydrosphere
Explanation:
Hydrosphere -
It compose of the total amount of water along with the organisms present on the surface of the planet Earth .
The hydrosphere includes , all the water bodies and the orgasms that live in the water body .
Hydrosphere comprise of all the states of water , i.e. , solid , liquid and gas .
Hence , seaweed lives in water , hence is the part of the hydrosphere .
