Definition of the word fall to

The phrase "fall to" has its roots in Middle English, dating back to the 14th century. In its earliest usage, it was spelled "faollen to" and used to indicate that someone or something has come to rest under the influence of gravity, as in "The apples fell to the ground." However, over time, the meaning of "fall to" expanded to include a wider range of actions, implying that someone or something is now appropriately positioned to undertake a particular task. For example, "The bread falls to Martha, as she is the best baker in the family" or "The responsibility falls to the president to make the tough decision." The phrase has also been used figuratively to denote a variety of ideas, such as "falling to" one's duties or responsibilities, "falling to" someone's share or inheritance, or even "falling to" a lower social or economic status. In modern English, "fall to" continues to be a versatile and useful idiom, frequently employed in both casual and formal communication.