How will the level of carbon in the atmosphere change if humans do nothing to reduce their impact on the carbon cycle?

the carbon levels would decrease, since humans make carbon from oxygen

this is true, assuming that the allele is completely recessive and incomplete dominance is not a factor.

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.