During autumn, the leaves of the plants turn red and fall, resulting in complete defoliation of the trees. which mechanism is taking place? . . dormancy. . senescence. . photoperiodism.

Dormancy

The phenomenon wherein the leaves of the plants turn red and fall during the autumn season followed by the defoliation of trees is a concrete example of dormancy. Dormancy refers to the time wherein plants don't grow and wait for necessary environmental factors like moisture, temperature and others. 

The answer is 1-plate movement along fault lines

El nino is a weather phenomenon caused when warm water from the western pacific ocean flows eastward. part1baan average of 7.7 hurricanes and 3.6 major hurricanes compares to 5 hurricanes and 1.5 major hurricanes from 1995-2005