An evidence from the story that the iroquois valued balance is that
a. one twin dwells in day; the other twin dwells in night.
b. the grandmother kills the twin she does not favor.
c. one twin only creates good things.

because they were not just any seashells they were sally's seashells

a constant variable, normally called a controlled variable, is the term for a variable that remains constant throughout an experiment, though other variables may change. an example is the water pressure for a faucet when measuring the amount of water released when the faucet is opened to various increments.