What is the mass number of an alpha particle?
(1) 1 (3) 0
(2) 2 (4) 4

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

its first and third is your answer i did the qustion the fourth isnt right