The answer to the question above is letter "A. drought". This natural disaster caused trouble to the citizens especially those who are in rural areas and are dependent on ecosystem services and natural resources for their livelihood. They were urged to find alternatives.
Explanation:
Wien’s Law:

The law states that the wavelength at which black body emits maximum heat is inversely proportional to the temperature of the body in Kelvins.

1) Walls at 300 K


2) Ice water at 273 K :


3) Hot water at 373 K :


4)Skin at 310 K:


5)An incandescent light bulb at 3000 K


There are two<span> basic </span>types of metamorphic rocks<span>. Foliated </span>metamorphic rocks<span> such as gneiss, phyllite, schist, and slate have a layered or banded appearance that is produced by exposure to heat and directed pressure.</span>
It would sometimes signify the unity of two separate kingdoms