Horsetails and ferns reproduce by making millions of powdery spores. how are they transported? a. dropped in place b. blown by the wind c. transported by insects d. eaten and distributed by animals

the supermassive black hole is in the middle of the galaxy.

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds