How do scientific test determine the properties of a substance

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.

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