Which of the following best defines density? a measure of how much a single particle weighs , , , a measure of how much a single particle weighs , ,

a measure of the amount of particles in a block of a substance , a measure of the amount of particles in a block of a substance , ,

a measure of how much space a block of substance occupies , , , a measure of how much space a block of substance occupies , ,

a measure of the amount of mass in a given amount of space

the answere is c

Explanation:

because I know

this would be about 43%

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 =