The most important difference between primary and secondary groups has to do with:

The most important difference between primary and secondary groups is that, primary groups are being referred to a family in which every person has while the secondary group is being referred to the society or the sociology class in which every person partakes to.This group has to do with the relationships that exist amongst them.

amber has allowed scientists to study dna that has been preserved over millions of years.

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.