Choose the correct answer for the given question from the options:
During a visit to a leech biopharmaceutical farm, two students met the biologist responsible for the unit. After the visit, they sought clarification by asking a few questions.
Note: The questions are as follows. The answer given by the biologist is among the options. Please select the correct answer.
1. The body of the leech at its anterior end and posterior end have suckers. Are they intended only for the attachment to the host body?
2. We have seen that leeches are swimming very actively, but they move slowly inside the boxes. Would you please tell us the mechanism involves for these two functions?