Question

One negative and one positive point on large population

Answer 1

one positive point could be that investors would like to invest in a country with large population as there would be healthy growth in the population every year which would increase demand for food , clothing, etc.

one negative thing could be poverty.

Answer 2

I think I can give you more negative points. Negative points on large population can be high level of unemployment, higher cost of living, natural resources getting depleted soon, poverty also increases, etc.
Positive points on large population can be that it leads to economic growth with increase in human resources, literacy level increases, investors invest in a country where population is more and people buy many thing and many more.........