Identify three types of electromagnetic radiation and describe the typical energy and wavelengths associated with each.

there are no contact forces mentioned on the list of choices that you've provided.

it is given that trillions of microbes make up to 1% to 3% of the body mass.

let's take average of this percentage: 2%

consider the average mass of the human body as 70 kg.

then, trillions of microbes would have mass  

therefore, 100 trillion micro-organisms would weigh:

this is an approximate value and could change depending on the mass of the human body and percentage of the microbes present in it.

average mass per microorganism =

the ima (higher than 1m) will be greater than the ima with the height of 1m.