How do fish use diffusion in respiration?

you first give the mouth to mouth

Explanation: then you do chest compressions

Fish and other aquatic organisms use gills to take up oxygen dissolved in the water and diffuse carbon dioxide out of the bloodstream. Some insects utilize a tracheal system that transports oxygen from the external environment through openings called spiracles.

Explanation:

mark as brainliest or atleast rate the answer

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.

ever get the answers? im stuck on this as well