Some dairy farmers want to increase the amount of milk produced by their cows. How can the farmers use selective breeding to increase milk production? A. By increasing the age of the cows that are bred
B. By choosing cows that are high milk producers
C. By limiting the number of offspring per cow
D. By choosing cows that can produce milk after eating the most food

I would say B.By choosing cows that are high milk producers

this is just my guess tho

for 8 am not sure maybe yes?

for 9 if it is asking if the male is more or less it would be less

hope i even just a little : )

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.