Life originate from the earth's inorganic atmospheric in the past ,but this on longer happens today.Give 2  reasons.

The frequency of the hum that we hear from a bee or any insect is due to the beats of its wings.  The sound is actually the result of the bee vibrating its flight muscles, and this can be achieved while the muscles are decoupled from the wings— so they can hum without flying or moving their wings, a feature known in bees but not other insects. This is especially pronounced in bumblebees, as they must warm up their bodies considerably to get airborne at low ambient temperatures.

A bee flying has varying beats but in various studies the figure is about 150 to 200 beats per second or 2kHZ. This as we can see is well within the acoustic range.