What is a disadvantage associated with trapping as a pest control method?

Trapping as a pest control method does indeed come with the disadvantage of requiring constant re-baiting and replacing. This ongoing maintenance is necessary to ensure that traps remain effective over time; without fresh bait, the likelihood of attracting pests decreases significantly. Additionally, traps can become less effective if they are not regularly checked and emptied, as the captured pests can fill the trap and prevent additional catches.

This disadvantage contrasts sharply with the idea of high effectiveness without effort or the notion that trapping requires no knowledge or planning; both of those imply a level of ease that does not reflect the reality of managing traps effectively. The immediate death of pests is often seen as a positive aspect of trapping, further distinguishing this correct answer from the other options presented.