Definitely cell phone reception! However books could be argued for since they also are a good more than a necessity. However the last 2 i believe would be classified more as necessities than goods.
~Hope this helps!~
Answer:Herbivores
Why?Well,herbivores only eat plants.If all producers went away,herbivores would die.
The answer is oral language skills which refer to the ability of one to break down the speech in smaller units of a sentence and syllable. This is vital in jobs which require people to communicate with others like politicians, negotiators, salesmen, etc.