Is this a true or false question?
Answer:
The starfish Pisaster ochraceus is a keystone species in the rocky marine intertidal communities off the northwest coast of North America. This predatory starfish feeds on the mussel Mytilus californianus and is responsible for maintaining much of the local diversity of species within certain communities. A keystone species is an organism that helps define an entire ecosystem. Without its keystone species, the ecosystem would be dramatically different or cease to exist altogether. This means that if the species were to disappear from the ecosystem, no other species would be able to fill its ecological niche.
Explanation:
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The answer is rock and mineral particles bcoz it is only option which is not living thing from start
The answer is Poliomyelitis. Poliomyelitis or also called as Polio, is a kind of disease involving a virus known as polio-virus that attacks the different parts of the nervous system that results to the paralysis of limbs or different parts of the body.
