Chemical reactions are the result of an atom attempting .

A. to become positively or negatively charged
B. to become electrically neutral
C. to reduce the number of electrons
D. to rearrange its configuration to result in a complete outer shell or have a stable octet.

the cost of mining is extremely low compared to the money earned from mining, creating income to improve the environment.

ask your friends for what they got then copy it down if you don't have any friends which is fine than google it or pay the teacher

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.