Which one of the following is an example of carrying out biological control of pests or diseases using microbes?

The insecticide obtained from the neem plant is:

The cessation of reproduction in an organism by creating hurdles in its biology or physiology,or its destruction by the use of another organism,is known as:

Which virus is responsible for the biological control of insects and arthropods?

Which microorganism is used to control harmful pests in cotton and fruit trees?

Which of the following statements regarding baculoviruses as biocontrol agents is/are correct?
$I.$ Baculoviruses are pathogens that attack insects and other arthropods.
$II.$ Most of these biocontrol agents belong to the genus $Nucleopolyhedrovirus$.
$III.$ They do not harm plants,mammals,birds,fish,and other non-target insects.
$IV.$ Baculoviruses are helpful in Integrated Pest Management $(IPM)$ programmes,in which beneficial insects are conserved.
Choose the correct option.