if a farmer uses insecticides and kills all the grasshoppers what effect will this have on the number of birds and amount of grass. give a reason for in each case​

answer: 45

explanationyou have to add as well to be it could be

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

so whats the answer

can you make it bigger i can't see it