We do not need much furniture ______ the room is small.
– although/ though/ even though +S+V: although.
– despite/ in spite of/ notwithstanding + N/V-ing: although.
– because / as / since/ now that/ on the grounds that +S + V: because
– because of/ as the result of/ due to / owing to / on account of/ by virtue of + V/ V-ing: because
We don’t need a lot of furniture because the room is very small.
Because behind is a clause (S + V) → choose “Because”
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