The correct answer is option 4: 1, 2 and 3.

Let`s dissect each option to better understand the results of El Nino:

Option 1 states that El Nino causes a reduction in the amount of plankton, which further reduces the number of fish in the sea. This is correct because El Nino disrupts the normal upwelling of nutrient-rich water, leading to a decrease in plankton populations and subsequently affecting the food chain.

Option 2 states that El Nino causes irregularities in the evaporation of sea water. This is also correct because El Nino alters the wind patterns and ocean currents, leading to changes in the distribution of warm surface waters. These changes in turn affect the rate of evaporation from the sea surface.

Option 3 states that El Nino causes distortion of equatorial atmospheric circulation. This is correct because El Nino disrupts the normally balanced atmospheric circulation between the eastern and western parts of the tropical Pacific Ocean. This disruption can lead to changes in weather patterns and the occurrence of extreme events such as droughts and floods.

Therefore, all three options (1, 2, and 3) correctly identify the results of El Nino.