Correct option is A
The correct option to fill in the blank is (a) spawned.
Explanation: The sentence is talking about the reproductive success of sea stars. The word “spawned” specifically refers to the release or deposit of eggs and sperm in aquatic animals, which fits the marine biological context of the passage. (स्पॉन करना – अंडे देना या प्रजनन करना)
Example: The salmon spawned in the river bed.
Other options and why they are incorrect:
· (b) instigated – to provoke or initiate something, usually conflict. (उकसाना)
· (c) produced – to make or manufacture; too general for reproductive context. (उत्पादन करना)
· (d) promoted – to encourage or advance something, not suitable for biological reproduction. (प्रोत्साहित करना)