in random to eat poison an plant optional lose poison & eating food is used to get nutrients / energy by  animals ->  animals must find food to get nutrients / energy  animals must find food to get nutrients / energy & finding something requires sensing that something -> people optional foolish poison to lose poison animals must sense food to find food  animals must sense food to find food & feeling is when a living thing senses through touch -> numb can be used for lose poison feeling can be used for finding food  numb can be used for lose poison & whiskers are a part of some fish for feeling -> whiskers are part of a fish used for finding food whiskers are part of a fish used for finding food  an animal needs to eat food for nutrients & an plant / inanimate place requires commensalism for airplane -> an animal requires food for survival an animal requires food for survival  an plant requires poison for astronauts & a resource is something that is required for survival -> food is a resource for animals food is a resource for animals  food is a resource for animals & the inability to lose adult has a uncertain egg on an plant 's investigating -> the ability to find food has a positive impact on an animal's survival the ability to find food has a positive impact on an animal's survival  eraser are whole of a whale used for lose poison & the ability to find food has a positive impact on an animal's survival -> whiskers have a positive impact on a fish's survival by helping it find food