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

[Q]: Many prosimians have at least _ nipples and produce litters rather than a single offspring.
[A]: four

[Q]: Piglets are born with stripes, which disappear in the first _ months.
[A]: six

[Q]: Fossil fuels harm biodiversity in _ other ways.
[A]:
two