However, not everyone is convinced that genetically modified foods are beneficial. Opponents say that too little research has been done on the effects of GMOs on humans and on the environment. They argue that GMOs could be creating new poisons. They are also concerned about what might happen if genetically modified plants breed with wild plants. Some farmers are concerned about the possibility of inadvertently crossbreeding GMO plants with non-GMO plants. For example, if the pollen from a GMO plant blows into their organic field, now that organic crop could become a GMO crop. The possibility also exists that all this interbreeding could lead to new strains of herbicide-resistant super-weeds. What is the topic sentence of this paragraph?

sorry but i dont know the answe

Explanation:

i think there should be answer choices

active voice: my father cut the tree.

passive voice: the tree was cut by my father.

active voice: people buy newspapers every day.

passive voice: newspapers are bought (by people) every day.

active voice: people have been using movies as political propaganda since world war ii.

passive voice: movies have been used as political propaganda since world war ii.

active voice: donna gave me my birthday present.

passive voice: i was given my birthday present (by donna). / my birthday present was given to me (by donna).

active voice: mom will leave the keys on the counter.

passive voice: the keys will be left (by mom) on the counter.

the words in parentheses are the agent of the passive voice and can be omitted when obvious, generic, or simply unnecessary.