What did malthus think would limit the population size?

radon is correct hope this

1)

i))the process of preparing food by green plants in the presence of sunlight is called photosynthesis.

ii) leaf is the site for photosynthesis.

iii) it takes place as,

6h2o+6co2=c6h12o6+602

not sure what it is

answer increasing the intensity, duration,and frequency of exercise progressively;