Learn Russian: Эхо идёт оттуда, откуда дует ветер, словно там кто-то кричит. - The echo comes from where the wind is blowing, as if someone is shouting there.

In English, we just say "from where," but Russian spatial correlative clauses usually require a pair. You need a demonstrative adverb in the main clause (оттуда — from there) to point to the relative adverb in the subordinate clause (откуда — from where). Literally, it says the echo comes from there, from where the wind blows.

Why does the sentence use идёт for an echo?

The verb идти isn't just for walking; it is used for things that travel or propagate through space, including weather (дождь идёт) and traveling sounds. Because the echo is actively moving toward the listener from a distance, идёт is the natural choice here.

Why is the word order дует ветер instead of ветер дует?

In Russian subordinate clauses, especially those starting with relative adverbs like откуда, it is very common to put the verb before the subject. Placing ветер at the end of its clause sounds more natural and puts the emphasis on the wind as the core piece of new information.

Why use кто-то here instead of кто-нибудь?