Question

36. The given graph shows changes in various
factors (Mand N) present in a water body
after the sewage is discharged at a point X
Sewage discharge point
Distance downstream
Refer to the given graph and select the
incorrect statement regarding L, Mand N.
A I could be bacteria which increase
tremendously in number due to
addition of sewage waste.
B M corresponds to biological oxygen
demand which decreases due to the
accumulation of sewage in water,
C. N could be aquatic animals like fish,
which die on account of non-availability
of dissolved oxygen.
D. Both A and C​

Answer 1

Answer:

D.both A and C

Explanation:

because it is the accumulation of pollution in water in two ways