Which balanced equation represents an Endothermic reaction?

1 a

2 d

3 a

4 c

explanation:

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

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a