What process is this? A mudslide flowing down a steep hill.

Weathering

Deposition

Erosion

Erosion cuz the mudslide is washing away other parts of Earth's ground

Explanation:

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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 =