Sam needs to use some technology as a safety measure to prevent the genetically modified crops from spreading beyond the area they are planted in. He can use the technology to make the seeds of genetically modified plants sterile.

Genetic use restriction technology.

Explanation:

Genetic use restriction technology is the technology used by the Sam in order to make the seeds of genetically modified plants sterile in order to prevent the plant from spreading. This technology is used for restricting the use of genetically modified plants by activating or deactivating several genes which cause second generation seeds to be sterile which means these seeds will not grow again.

format change of dna.  

meiosis is the correct answer