Meaning: "concealing" means hiding or making less visible.

Wrong options:

• concealling: It adds an extra "l". Check the letters: "concealing". A small spelling mistake loses the mark.
• conceal: "conceal" is missing the ending. The speaker says "concealing", with "ing" at the end.

Correct answer: disguise

Explanation: Here you hear "in order to disguise their location". After "to" you need the plain word for an action.

Meaning: "disguise" means to hide or change appearance so others cannot see.

Wrong options:

• dissguise: It adds an extra "s". The right spelling is "disguise". Every letter must be correct to get the mark.
• disguised: "disguised" has an extra "d" at the end. The speaker says "disguise".

Correct answer: matching

Explanation: The speaker says "background matching, where the prey". The word ends in ing, so do not drop it.

Meaning: "matching" means being the same as the background so you blend in.

Wrong options:

• matchting: It adds an extra "t". Check the letters: "matching". A small spelling mistake loses the mark.
• match: "match" is missing the ending. The speaker says "matching", with "ing" at the end.

Correct answer: exploiting

Explanation: You hear "by exploiting chromatophores". It is an action word that ends in ing.

Meaning: "exploiting" means using something for a purpose or to gain effect.

Wrong options:

• exploting: It leaves out the "i". Check the letters: "exploiting". A small spelling mistake loses the mark.
• exploring: This has a different meaning, so it does not fit here.

Correct answer: pigment

Explanation: Listen for "the pigment and light-reflecting cells". It comes after "the", so you need a word for a thing.

Meaning: "pigment" means the coloured substance in cells that makes skin colour.

Wrong options:

• pigmentation: "pigmentation" has an extra "ation" at the end. The speaker says "pigment".