In the following passage some words have been deleted. Fill in the blanks with the help of the alternatives given. Select the most appropriate option for each blank. Comprehension:
With the groundwater table receding alarmingly, an ostrich mentality will only increase water woes. Deficit rainfall (1) ______ indiscriminate extraction of ground water (2) ______ two major reasons for (3) ______ situation. Government must promote (4) ______ harvesting and conservation. Citizens must (5) ______ learn to use water judiciously or else the State will run out of water like Cape Town.
Select the most appropriate option to fill in blank No.4.