【正确答案】正确答案： Disguise Many species of animal practise tactics to disguise their appearance, / usually by blending in with their environment. / Such tactics mainly depend on the physical characteristics or behavior of a species and its enemies. / Usually environmental and behavioral factors can cause species to employ a variety of tactics. / And the most common one is background matching, / in which a species conceals itself by resembling its environment. / In its simplest form, animals such as deer and squirrels / resemble the earth tones of their environment. / Another important tactic is to have disruptive color and pattern. / This form of disruption causes attackers to misidentify what they are looking at. /