Which indicates that an exotérmica chemical reaction occurs when two substances are mixed together ?

the major pests we deal with are insects, weeds and fungal diseases. a pesticide is a product, whether organic or chemical, used to kill the target pest. there are other techniques gardeners should use that can prevent the severe infestations that make the use of pesticides necessary

just did the assignment and the answer was #1 +2 n

i'm wiling to try and you : )