A virus killed most of the blue-footed ducks in Japan reducing the population from 9,000 to 900. In an effort to help preserve the species, 50 blue-footed ducks were trapped and used to start a new population in England. Eventually the two blue-footed duck populations could no longer successfully interbreed. This event would best be described as -

Speciation

Explanation:

When the virus reduced the population of the blue-footed a new population of the same bird trapped in England can no longer interbreed. This event can be described as speciation.

Speciation is the process by which a new species with a different character from the parent trait is formed during evolution. Speciation can occur as a result of the absence of an organism from its population for a long time. This is basically how new species are produced and these organisms find it difficult to reproduce with each other after speciation.

The geographic isolation caused the speciation that the blue-footed ducks encountered

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above

more words for this could be abiotic and biotic

abiotic: living organisms within an ecosystem

biotic: non-living organisms within an ecosystem