Answer:
The electromagnetic radiation per-unit- area increase by 42.65 times.
Explanation:
The radiation per-unit- area (P) is directly proportional to the fourth power of the temperature. Thus,
P ∝ T⁴
For, when the temperature is raised from T₀ to T₁ , the radiation per-unit- area is related to as:

T₀ = 900 K
T₁ = 2300 K

So,
<u>P₁ = 42.65 P₀</u>
<u>The electromagnetic radiation per-unit- area increase by 42.65 times.</u>
The correct option is TWO LARGE RIVERS.
The Aral lake was once the fourth largest lake int the world. It was fed by two large rivers: Amu Darya and Syr Darya rivers. Some even called the Aral lake a sea because of its large size, but that was then, the lake has been drastically reduced in size now due to water diversion.
Answer:
The goal of the Marshall plan is to prevent the spread of communism in Western Europe .