Questions & Answers about Хоча часник маленький, він свіжий.
Хоча means although, though, or even though.
It introduces a subordinate clause that gives a contrast:
Хоча часник маленький = Although the garlic is small
він свіжий = it is fresh
So the whole sentence has a concessive meaning: one fact is true despite another fact.
Because Хоча часник маленький is a subordinate clause, and Ukrainian normally separates that clause from the main clause with a comma.
So the structure is:
Хоча часник маленький, + він свіжий
This is very similar to English punctuation in a sentence like Although it is small, it is fresh.