SOLAR SYSTEM

UNIVERSE

SPACE EXPLORATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Rewrite the sentence and insert the comma where necessary.Without better protection from radiation people could not possibly live on Mars.
A
Without better protection from radiation, people could not possibly live on Mars.
B
Without better, protection from radiation people could not possibly live on Mars.
C
Without better protection, from radiation people could not possibly live on Mars.
D
Without better protection from radiation people could not possibly, live on Mars.
Explanation: 

Detailed explanation-1: -How to protect Mars colonists from radiation. One method of helping astronauts avoid the radiation on Mars is active shielding. For example, superconducting electromagnets could be used to create a powerful magnetic field to deflect the incoming charged radiation particles away, just as Earth’s field does.

Detailed explanation-2: -"Space radiation is mellow in some places on Mars. We expect it to be higher where there is hydrogen near the ground, ‘’ Lee said. “In any case, it is something that, over course of months, would end up killing you as well."

Detailed explanation-3: -On Mars there is very little atmosphere to protect living things from UV radiation-or from X-rays and gamma-rays or even more dangerous cosmic rays. Organisms would have to provide their own protection in the form of body changes (adaptations) or sheltered environments (such as underground).

Detailed explanation-4: -And while studies have shown that the human body can withstand a dose of up to 200 rads without permanent damage, prolonged exposure to the kinds of levels detected on Mars could lead to all kinds of health problems – like acute radiation sickness, increased risk of cancer, genetic damage, and even death.

Detailed explanation-5: -Current spacecraft have multiple bumper shields of thin aluminium sheets, a net of Kevlar and epoxy (materials high in hydrogen that are also used in military and fire-fighting gear), and air gaps in between to slow down radiation particles.

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