Found at the lowest point of a large drainage area, these seasonal, marsh-like ponds collect and store water from rain and runoff. Unlike vernal pools, playas generally fill when temperatures are unsuitable for plant growth, and often the water is salty, alkali or both.
source- google
Doldrum is the region of very calm and little or no wind on either side of the equator. Doldrums which is also called convergence zone is an equatorial region of the Atlantic ocean which has sudden storms and light unppredictable winds. In addition doldrum is abelt around the earth near the equator where the sailing ships sometimes get stuck on windless water.
The answer would be y axis, x axis, another y axis and x axis. One then can reflect y axis (5,1) and would reflect to x axis (5,-1) And then across y axis (-5,1) and would back to (-5,1). Hope this is the answer and would help.
Cays- they are formed when ocean currents transport loose sediments across a surface of a reef to a despositional node
