Select TWO answer choices.
While normal floods resulting from usual monsoon rainfall are ... the growth of the crop, recently there has been an increase in the frequency of high-intensity floods that do not have such welcome effects.
(1) conducive to
(2) hindered by
(3) devastating for
(4) deleterious or
(5) essential for 
(6) indispensable to
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New words to learn
monsoon: (1) the season, from about April to October, when it rains a lot in India and other southern Asian countries
(2) the heavy rain that falls during the monsoon, or the wind that brings the rain
(Treasure)
(rain, drizzle, shower, downpour, hail, sleet, the rains, monsoon)
drizzle: light rain with very small drops of water
shower: a short period of rain that can be heavy or light
downpour: a short period of very heavy rain that starts suddenly
hail: frozen rain that falls in the form of hailstones
sleet: a mixture of snow and rain
the rains: heavy rain that falls during a particular period in the year in tropical countries
high-intensity: a collocation for intensity and high
welcome: if something is welcome, you enjoy it because you feel that you need it
(Example) The weekend was a welcome break from the pressure of work.
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conducive to: if a situation is conducive to something such as work, rest etc, it provides conditions that make it easy for you to work etc (Synonym) helpful
(Example) an environment conducive to learning
hinder: (Synonym) hamper
deleterious: damaging or harmful (Synonym) detrimental (Collocation) deleterious effects
indispensable: (synonym) essential
(Example) This book is indispensable to anyone interested in space exploration.
(indispensable in/ for doing something)
(Example) Meat is not indispensable for maintaining a healthy diet.
