Question

Which of the following adaptation is only found in aquatic animals?

(a) Light bone. (b) Presence of feet.

(c) Presence of gills (d) Presence of hooves​

Answer 1

answer: presence of gills

Answer 2

(c) Presence of gills.

━━━━━━━━━━━━━━━━━━━━━━━━━━

About the answer :

Gills helps the aquatic animals to respire under water. So, your answer is presence of gills. The gills are found behind and to the side of the mouth cavity and consist of fleshy filaments supported by the gill arches and filled with blood vessels , which have gills a bright red colour. Vertebrates have two types of gills : internal and external. These are like the structure of branch. They transfer ions and water as well as exchange of oxygen, CO2 , acid and ammonia. However bony fish have single gill.The feathery filaments of aquatic animals are rich in blood . These gill filaments absorb oxygen from the water and move it to the bloodstream. At the same time waste CO2 passes out through gills into the water.

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

$\boxed{\mathfrak{\red{\fcolorbox{red}{pink}{ @BrainlyHoney}}}}$