Weight will increase a: gravity decreases b: gravity increases c: number of particals increases d: number of particals decrease

Weight will increase as Gravity increases

Explanation:

the more gravity the more weight if you were in space there is less gravity so you would weigh less so their for the answer is B Gravity Increases.

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it would be c. predictability

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 =