Learn Spanish (Latin America): Yo clasifico cada posesión y regalo todo lo que no necesito. - I sort each possession and give away everything that I do not need.

When using todo lo que (everything that), we use the indicative when talking about something known, factual, or currently experienced. Here, the speaker already knows exactly what they don't need, making it a concrete fact. If they were talking about an unknown future scenario, like saying "I will give away everything that I might not need," they would use the subjunctive (necesite).

Isn't regalo the word for "gift"? Why is it translated as "give away"?

Regalo is commonly used as a noun meaning "gift", but here it is the "yo" (I) form of the verb regalar. Regalar means "to give away" or "to give as a gift". Because it follows y (and) connecting two actions, it acts as a verb here: "I sort... and I give away".

Why do we need the lo in todo lo que? Can I just say todo que?

No, you can't skip the lo. In Spanish, todo que is grammatically incorrect. When you want to say "everything that" or "all that", you must use the neutral pronoun lo to represent the abstract idea or the collective group of unnamed things. Therefore, the phrase is always todo lo que.

Since posesión is a feminine noun, why doesn't cada change to match its gender?