Spawning nest created by salmon is called:

Correct option is C

→ A “redd” is a shallow depression made by female salmon in gravel beds for laying eggs.
→ The female uses strong tail movements to excavate the nest.
→ Eggs are covered with gravel to protect them from predators and currents.
Information Booster:
→ Redd formation is essential for oxygen supply to embryos.
→ Gravel size and water flow determine survival rates.
→ Disturbance of redds affects salmon recruitment heavily.
Additional Information (Other Options):
(a) Lek: Display site used in birds.
(b) Kok: No relevance here.
(d) Nest: Generic term; salmon nest is specifically called redd.