In this sentence, which word would correctly complete the thought: "I spent most of my ____________ on a farm in Wales before the family moved to America."?

The correct completion of the sentence is "childhood." This word refers to the period of time when a person is a child, encompassing the experiences and memories made during those early years. In the context of the sentence, it fits perfectly as it conveys the idea of spending time in a specific phase of life—implying that the speaker grew up on a farm in Wales before moving to America.

The other options do not fit the context as well. "Child" refers to an individual young person and would not logically describe the temporal experience of living on a farm. "Children" is the plural form, relating to multiple young individuals, which does not align with the focus on a personal experience. "Childlike" describes qualities resembling a child, but it does not pertain to a period of life, making it unsuitable for this context. Therefore, "childhood" is the most appropriate choice, effectively completing the thought presented in the sentence.