LDC or LEDC for less economically developed countries (if that's what you where looking for)
Yes, because the energy is unlimited
Answer: A. falls
Explanation: When moving away from the points marked as H (High) i.e area where the air pressure is high, the surface air pressure falls. This is because you as you moving away from H point and in the processing, you are also moving towards the point marked as L (Low) low air pressure point area so the pressure falls.
Pollution is the primary cause