1 china
2 The Amazon river
3 Ángel falls
Within or on the edges of the spiral arms of the galaxy<span> (Like the dust clouds, </span>ionization nebulae<span> are </span>located<span> primarily within or on the edges of spiral arms. This is because spiral arms are regions of active star formation.</span>
I think it is b hhhhhhhhhhhhhhhhhhhhhh