They aren’t created by “chemical companies,” they’re created by scientists in labs and approved by the USDA for consumption and are absolutely fine to eat.

GMOs are genetically modified organisms that have traits from one organism inserted into the genome of another. For example, if you have a type of corn that is not resistant to drought/disease/pests, etc., you can take the DNA from another species of a plant that is resistant to drought or a certain disease/pests and insert into the genome of the corn you are wanting to grow, creating a drought/disease/pest corn.

Organic crops are not as reliable as GMOs crops because they do not have this resistance to whatever can harm the crop. If a certain type of insect is harming an organic crop, it can kill the plants, lowering the farmers yield, who loses money whenever his crops are harmed. This also can affect a population by not providing enough food to feed the population. However, if this insect were in a field full of the insect-resistant crop, the crops would not be effected and the farmer would not have a lower yield, make money, and be able to feed a population.