Why would an organism want to call attention?
what purpose does the rattlesnake’s rattle serve?
what purpose does sweet scent serve for a plant?
what plant or animal has features or behaviors other than color and pattern to attract attention?
how is an attention mechanism a stimulus/response interaction?
what is communication?
what kinds of stimuli can initiate communication?
what kinds of things do animals need to communicate?

explanation:

metals have excess of electrons whereas non-metals have deficiency of electrons. thus, in order to gain stability metals easily donate their electrons to the non-metals.

for example, electronic configuration of sodium is and electronic configuration of phosphorous is .

when a phosphorous atom and sodium atom combine together then sodium will donate is extra one electron to the phosphorous atom. as a result there will be formation of ionic bond between sodium and phosphorous.

the reaction will be as follows.

there, are three sodium sodium atoms and each of them will donate its one extra electron to phosphorous atom. thus, the sub-shell of phosphorous gets completely filled.  

thus, we can conclude that electrons are transferred from atoms of sodium to atoms of phosphorous. this transfer makes the sodium atoms donate one electron and the phosphorous atoms to gain one electron. as a result, the sodium and phosphorus atoms strongly attract each other.

i'm pretty sure its b i might be wrong though!