Salinization and desertification
I think your answer is B.) The objects must be in direct contact with one another
Answer:
GMOs refers to organisms that have had changes in their DNA using genetic engineering and the threat is to make ssure they are safe for people because if this genetic modifications.
Explanation:
GMO food is food produce from organisms that have been genetically modified and people is concerned about the dangers of eating this food. However, scientific data have said that it doesn't generate a risk to human health but every GMO food needs to be examine.
Un organismo genéticamente modificado u organismo modificado genéticamente, también llamado transgénico erróneamente, es un organismo cuyo material genético ha sido alterado usando técnicas de ingeniería genética.