Here are three sentences using the word 'camouflage':

"Camouflage is often green when trying to be disguised in the forest."

"It is important to wear camouflage during a battle so that you cannot be seen by the enemy."

"Camouflage is sometimes very heavy which makes it difficult when you are trying to get away from the enemy."

d. avoid predators

camouflage

This depends on your definition of camouflage. It can be said that all animals camouflage themselves to some degree, called Crypsis camouflage.

i guess a crypsis camouflage

no shark do not camouflage