The answer is B, it is the only answer that talks about electric signals.
Food Chains: Food chain is a model that shows flow of energy and nutrients from one organism to another organism in an ecosystem. ... A food also shows the relation between organisms as who they are related with each other by the food they eat. Plants and animals requires some type of food for survival.
C since the other ones dont even make sense.. It isnt positive if its flooding, it isnt unity because its destroying everything
Yes. It can lead into something called a mutation.
I am not sure if this is what you mean but organ? or a system?