The Olmecs, aka the earliest known major civilization in Mexico following a progressive development in Soconusco. They lived in the tropical lowlands of south central Mexico
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The Oceans are saline or salty because of the several natural occurrences. One of the reason is the rivers because it brings water with minerals by crossing over soil and stones, moving salt along the way, which adds into the oceans, results in salinity by evaporating the water.
Ocean salinity levels can change from place to place. The Mediterranean Sea is saltier. The Atlantic Ocean has access to the freshwater rivers, such as the Amazon which provide less salinity in the ocean.
The five stages of the demographic transition model. Total<span> population is low but it is balanced [balanced: A population is in balance when birth rates equal death rates. ] due to high birth rates and high death rates. Total population rises as death rates fall due to improvements in health care and sanitation. hope this helps you</span>
