Which is expected to happen during el niño?

a. there is unusually low air pressure over the western tropical pacific.

b. the pressure gradient decreases.

c. upwelling along the west coast of south america increases.

d. the trade winds strengthen.

The answer is B. The pressure gradient decreases

the answer is d. made landless peasants that owners of large haciendas

a mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. this uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.a geomagnetic reversal is a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.