Fact 1: Breathing is when a gill converts from oxygen in water into oxygen in blood.

Fact 2: Shark gills remove the oxygen from the water.

Given the two facts above, answer the question "What breathing use gills to convert oxygen in blood?" with the following options: 
- sharks
 - octopus
 - hippos
 - a fish
 - Lobsters
 - water bugs
 - trout
 - alligators


 

 sharks        