PLEASE ANSWER NUMBERS 7, 9, 19, 16, 20,21,22,23,24

Explanation:

if u read the passage then u would know it so i prefer going thru passage and reading questions

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