The correct answer is - warm and moist.
Most of the air in the low troposphere at the equatorial low-pressure belt in warm and moist. The reason for this is that this part of the Earth is getting constant high intensity solar radiation. That results in constantly high temperatures. The high temperatures result in warming up the land, as well as the water masses. The heat leads to lesser density of the air masses because the molecules are becoming more dispersed. The water has much higher rates of evaporation, and the water vapor leads to saturating the air with moist, as well as making it even less dense as the water vapor is lighter than the standard air mass. All of this results in less dense air masses that have lower air pressure, are warm, and have a lot of moisture in them.
The root cause of Somali piracy lies in the threat that illegal fishing posed to the livelihoods of subsistence and commercial fishermen along the coastline. During the early 1990s, Somali subsistence fishing and the fishing industry coexisted with illegally-placed foreign fishermen in the vast Somali waters.
The earth is all mixed together, but all of its parts can be seen. This is true regarding all of the different people and cultures worldwide, as well as the physical features of the planet itself. We can see it's dirt, soil, sand, mountain, steppes, plateaus, animals, rivers, etc.
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Doubling time in reference to population is used to study the population growth. It projects the amount of time that the population will take to double in a particular region and it is calculated keeping in mind the annual growth rate of population of that area. This can be calculated by the rule of 70. But it is very rare that the doubling time remains the same for long and it is also rare that it changes drastically.
