The growth of population has its problems as we shall see. As there are more and more mouths (1)_____, there comes a great strain (2)_____ the resources of a country; this is real in the case

The growth of population has its problems as we shall see. As there are more and more mouths (1)_____, there comes a great strain (2)_____ the resources of a country; this is real in the case of developing countries with the result they are unable to push ahead economically(2) ................