tpo17阅读第二篇第二题Paragraph2:Inthevariedandconstantlychanginglightenvironmentoftheforest,ananimalmustbeabletosendvisualsignalstomembersofitsownspeciesandatthesametimeavoidbeingdetectedbypredators.Ananima

Question

tpo17阅读第二篇第二题
Paragraph 2:In the varied and constantly changing light environment of the
forest,an animal must be able to send visual signals to members of its own
species and at the same time avoid being detected by predators.An animal can
hide from predators by choosing the light environment in which its pattern is
least visible.This may require moving to different parts of the forest at
different times of the day or under different weather conditions,or it may be
achieved by changing color according to the changing light conditions.Many
species of amphibians (frogs and toads) and reptiles (lizards and snakes) are
able to change their color patterns to camouflage themselves.Some also signal
by changing color.The chameleon lizard has the most striking ability to do
this.Some chameleon species can change from a rather dull appearance to a full
riot of carnival colors in seconds.By this means,they signal their level of
aggression or readiness to mate.
　　2.According to paragraph 2,what is
problematic about an animal's sending visual signals to members of its own
species?
○Signs that make an animal visible to its species also make it
visible to predators.
○An animal that changes color to avoid predators can
confuse members of its species.
○Changing light may require an animal to move
beyond the visual range of other members.
○The animal may mistakenly signal
aggression when it meant to signal readiness to mate
答案为什么选A啊,题中不是说要避免被捕食者发现么?

Answer 1

定位词就是发送视觉信号时的麻烦.在第二段说,在森林坏境中多种持续变化的光照中,一个动物必须能发送信号给他们的同类,并且同时还能避免被捕食者侦查到.so,一个动物发信号时候可能遇到的麻烦就是,背捕食者看都,只有a选项表达了这个意思