A drowning man will clutch at a straw #shorts

On the moon, an astronaut can not drink lemonade with the help of a straw because

In a rescue attempt,a stationary helicopter in air drops a life preserver to a drowning man being swept downstream by a river current of constant velocity "v" .The helicopter is at a height of "45m" .The man is "6.0m" upstream from a point directly under the helicopter when the life preserver is released.It lands "3.0m" in front of the man.How fast is the current flowing? Neglect air resistance. g=10m/s^(2)

Figure 8.2 shows a child blowing air with a straw near the opening of another straw which has its other end in a soft drink bottle. It was observed that the level of the soft drink in the straw rises up as soon as air is blown over its open end. Which one of the following best explains the reason for rise in level of the drink?

Edible part of a straw berry is