In 10 or more sentences describe te terms of indicator, carbohydrates size, osmosis and diffusion

I don't think anybody's willing to write sentences for you, but look, let me tell you the definitions
Diffusion - when particles go from a higher concentrated area to a lower concentrated area
Osmosis - Water diffusion
Indicator - an event, entity or condition that typically characterises a prescribed environment or situation
Carbohydrates size - Portion serving of saccharides (?)

ATP donates energy through C phospho anhydride bond hydrolysis.

Explanation:

ATP or adenosine triphosphate is an energy rich compound which contain 3 phosphate moiety that are linked by 2 high energy phospho anhydride bonds.

   The hydrolysis of phosphoanhydride bonds releases high amount of free energy which is used by cellular system of our body to exhibit various cellular,biological and physiological functions.

 Some anoxygenic photosynthetic bacteria are able to use H2S or hydrogen sulfide as an electron donor.

Opportunistic pathogens only cause infection under certain circumstances eg in immune compromised hosts.