In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

[EX Q]: Notebooks are laptop computers that weigh between five and _ pounds.
[EX A]: seven

[EX Q]: Excess potassium induces larval metamorphosis in _ marine invertebrate species.
[EX A]: four

[EX Q]: Cats have five toes on their forefeet and _ toes on their hind feet.
[EX A]:
four