6) A con of GMOs is that

• they are creating herbicide tolerant crops.
• there is higher crop production.
• they require fewer materials to grow crops
• there is inefficient research to know the long term impacts they have.

• there is inefficient research to know the long term impacts they have.

Are you sure

Yes, because the con of GMOs mentioned in the list is about the lack of adequate research on their long-term impacts. The other points listed are actually potential pros of GMOs.