Why are zebra mussels a problem in the Great Lakes but not in the lakes systems where they came from?

B. They have natural predators in the other lakes.

Explanation:

I'm pretty sure that's it, because if it's the lakes they originally came from, then they'd have predators to even their population out.

preservation because he preserves part of the land and preserves means save

explanation:

correct answer: understand the different control methods available

integrated pest management is an strategy that is based on the ecosystem and try to prevent the pest and the damage caused by them by applying combination of technique like habitat manipulation, biological control and use of resistant varieties.

the main aim of the integrated pest management is not to completely eliminate the pest but to strengthen the ecosystem so that conditions are favorable for plants and unfavorable for pests.