- Some species camouflage patterns may be ...., granting those species a higher chance of survival in a heterogeneous environment.
(1) plastic 
(2) subtle
(3) singular
(4) consistent
(5) imitable
New Words to learn
plastic: (adjective) (1) made of plastic (2) a plastic substance can be formed into many different shapes and keeps the shape it is formed into until someone changes it (3) something that is plastic looks or tastes artificial or not natural
Subtle: (1) not easy to notice or understand unless you pay careful attention (2) behaving in a skillful and clever way (3) very clever in noticing and understanding things
(Collocation)
(1) subtle + form
(2) subtle + hint
(3) subtle + smell/ taste/ flavour etc
(Example) - The pictures are similar, but these are subtle differences between them.
- a subtle form of racism
- The dish had a subtle hint of ginger.
singular: very great and very noticeable
(Example) - He showed a singular lack of tact in the way he handled the situation.
imitable: not unique - somethings that can be copied
