4 What is not a possible observation of
salmon swim upstream to spawn?
F Salmon start their spawning season
in the fall.
G Bears easily prey on salmon as they
swim upriver.
H The average weight of a spawning
salmon is 7.2 pounds.
1 Most of the salmon seem to be of
adult size.



Answer :

Final answer:

Salmon swim upstream to spawn as part of their life cycle, overcoming obstacles like waterfalls and predators.


Explanation:

Salmon swim upstream to spawn as part of their life cycle. They start in freshwater streams, migrate to the ocean, and return to their birthplace to reproduce. They overcome obstacles like waterfalls and predators on their journey back upstream.


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