Can someone please help me

its temperature is increasing. this causes molecular vibrations to increase.

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate

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