nature (the natural world)
大 · 3 strokes
Depicts an adult man facing forward and standing erect. The meaning later shifted to "big".
自 · 6 strokes
Pictograph of a nose. Original form of 鼻 (nose). In China, when people point to themselves, they typically point to their nose.
然 · 12 strokes
Phonosemantic compound. 灬 represents the meaning and 肰 represents the sound. Based on the original meaning "burn", now written as 燃. The current meaning is a phonetic loan.