This question is not about physics science.
The answer is: option <span>a. Five-year-old children have longer attention spans than three-year-old children.
It is the attention ability what let the older children to stay longer in one location instead of being moving between different activities. The younger children who cannot keep their attention long time in a same activity entertain themselves by changing activities.
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I think you can just sub the values in? unless the qn is asking for smth else?
Answer:
option A is the correct answer
Start with saying “If...” and then say “the the....”