that you own a rowboat and enjoy going rowing on a nearby dam in the summer. In December, you are planning to go rowing with two of your friends (thre coletotalintheboat), and in January, you are planning to go rowing with just one friend (two people total in the boat). Will you put in more effort (row harder) on th ee person tre or on the two-person trip?

You will put in more effort on the three-person trip das impossible to say - no research has examined this question
You will put in the same amount of effort on both trips

You wil put in more effort on the two-person trip
choose the correct answer

It is impossible to say since no research has examined this question.

It is harder to row a heavier skiff.

That is correct, more effort would be required to row a three-person trip in a rowboat compared to a two-person trip.