The gerund in this sentence is "learning". A gerund is a verb form which is acting as a noun, in this case after the preposition "in".
Answer:
Sacrifices in this novel can be very small things – choosing not to buy little luxuries, for example, like Christmas presents. The March girls have learned how to sacrifice, but not how to do it cheerfully.
Explanation:
Thats my fave book i read it like 12 times
Answer:
Trust that person regardless of the false accusations