What is the most important aspect of biotechnology in the field of agricultural production?

Which of the following statements is incorrect?

Which genes encode proteins that control cotton bollworms?

Genetic modification has:
$I$. reduced reliance on chemical pesticides
$II$. reduced post-harvest losses
$III$. increased efficiency of minerals used by the plants
$IV$. enhanced nutritional value of the food
Which of the statements given above are correct?

How is biotechnology useful for increasing food production in agriculture?

Identify the nematode from the following options.