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
For the health and survival of freshwater plants and animals, the pH level of a water body must remain between 6.5 and 7.5. This specific range creates an ideal environment that supports diverse aquatic ecosystems. When the pH level falls below 6.5 or rises above 7.5, it can become detrimental to the delicate balance of life within the water, leading to stress and potential harm for the organisms that depend on these habitats. Maintaining proper pH levels is crucial for ensuring the well-being of aquatic ecosystems. Hence, the correct option is (a) 6.5 – 7.5.