​ Why do all cells in the body need oxygen?​​

For nutrition and energy

Explanation:

Oxygen has some chemicals that the body transfers into nutrition and energy. Without this your body would not be able to function properly. When we exhale (CO2) that was chemicals the body doesn't want or need.

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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.