How do gmo crops affect the food industry? production costs are lower. production costs remain the same. crops have little tolerance to chemicals, thereby requiring a limit on the use of chemicals. gmo crops are more resistant to insects.

Explanation:

GMO crops refers to the Genetically Modified Crops, plants which DNA has been modified with genetic engineering tools. The main purpose is to create plants with new DNA to improve specific qualities as resistance to pests or diseases, environmental conditions, reduction of spoilage, resistance to chemical treatments, or just improving the nutrients facts. Basically, GMO crops are aimed to ensure the endurance of plantations, and resistant to insects is part of it.

On the other hand, other options don't make sense or they aren't part of the purpose of GMO crops. Production costs don't affect food, affect companies' economy and the tolerance to chemicals is not lower, because that way plant won't survive to those reactions.

Therefore, the last sentence is the answer.