As of January 2011, nonmortgage consumer debt had increased for the fourth straight month. At the same time, credit card debt fell to a six-year low point. Excluding mortgages, how can it be that consumer debt is rising while credit card debt is falling?

Often, a goby fish and a shrimp will live together in a burrow the shrimp has dug in the sand. the shrimp is almost blind and therefore is unable to see predators approaching when he is outside of the burrow. when the shrimp is in danger, the goby fish touches the shrimp with its tail to warn him. then, both go back into their burrow for safety. which type of relationship does this represent? a. mutualism b. parasitism c. commensalism d. predator/prey