Which of the following questions can use science as a method of inquiry?

a what is the density of water?
b which type of music is better, country or rock?
c should baby girls be dressed in pink?
d when is it appropriate to take medication?

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