For the first question, the correct response is:
A drag suit will have more drag in the water than a tight-fitting racing suit; therefore, swimmers wearing drag suits will need to work harder to achieve the same net force in the water as they would achieve while swimming in racing suits.
This statement accurately explains that drag suits create more resistance against the water, requiring swimmers to exert more effort.
For the second question, the correct response is:
By swimming harder in practice, they will become stronger swimmers, making them more competitive.
This reflects the idea that using drag suits in training increases the physical demands on swimmers, ultimately improving their strength and competitiveness in races.