An efficient hunting-gathering mode of subsistence among our ancestors involved question 3 options: a. women providing a majority of the daily calories needed by the family b. a sexual division of labor c. women participating alongside men in big-game hunting d. men providing all the food save

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