The pH range most conducive for life of fresh water plants and animals is
(a) 6.5 – 7.5
(b) 2.0 – 3.5
(c) 3.5 – 5.0
(d) 9.0 – 10.5
(a)
The pH of the water body should be in the range of 6.5-7.5 for the survival of freshwater plants and animals. Below and above this range is harmful to aquatic life.
Hence option (a) is correct.