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

[EX Q]: Southern moles are six to _ inches long and weigh three to four ounces.
[EX A]: seven

[EX Q]: Ice jams cause flooding because of _ main features.
[EX A]: two

[EX Q]: Scientific names consist of _ parts, hence they are binomial.
[EX A]:
two