The world’s deepest lake is Lake Baikal in Russia. And you’ll find there the <span>Baikal seal, Lake Baikal seal or nerpa. It is a type of </span>earless seal <span>widespread to </span>Lake Baikal in Siberia, Russia and the only mammal there. Like the Caspian seal, it is interrelated to the Arctic ringed seal. The Baikal seal is one of the smallest true seals and the
only completely freshwater
pinniped<span> species. It remains a scientific ambiguity of how
the seals initially came to Lake Baikal, hundreds of kilometers from any ocean.</span>
A chemical indicator is a substance that changes color when you an acid to it. it is used to test the acidity in water, soil, etc.
i havent learned how it works yet , but ill try to figure it out for you
7m + 19 would be the simplified answer
Hope this helps
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