What activity involves harvesting fruits from a farm?

The correct answer is related to the specific process of gathering mature fruits from trees or plants in a farm setting, which is termed fruit picking. This activity typically requires careful handling to avoid damaging the fruits and often involves selecting only those that are ripe and ready for consumption or sale.

In contrast, crop rotation refers to the agricultural practice of alternating the types of crops grown in a particular area to maintain soil health and fertility, which does not directly involve harvesting. Planting is the act of sowing seeds or young plants into the soil, while trimming involves cutting back parts of a plant to promote growth or maintain size, but neither of these is related to the act of harvesting fruits. Thus, fruit picking is the accurate choice as it directly relates to the activity of collecting fruits from a farm.