in order to eat food an animal must find food & 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 ->  animals must sense food to find food  animals must sense food to find food & feeling is when a living thing senses through touch ->  feeling can be used for finding food  feeling can be used for finding food & whiskers are a part of some fish for feeling ->  whiskers are part of a fish used for finding food  an animal needs to eat food for nutrients & an animal / living thing requires nutrients for survival ->  an animal requires food for survival  an animal requires food for survival & a resource is something that is required for survival ->  food is a resource for animals  food is a resource for animals & the ability to find resources has a positive impact on an animal 's survival ->  the ability to find food has a positive impact on an animal's survival  whiskers are part of a fish used for finding food & 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