(a) recycle, regenerate, reuse

(b) reduce, regenerate, reuse

(c) reduce, reuse, redistribute

(d) reduce, recycle, reuse

Correct option – ( d  )

Explanation – to conserve the natural resources for long time we should reduce or minimize its use . Wastage of resources should be strictly stopped . Such things should be used which can be recycled and can be re used  and which are eco – friendly . Single use materials should not be used .