How could the barter system still be used? a) you trade an apple for a banana at school. b) you sell your old skateboard for $25. c) you give someone your old cowboy boots. d) you work for your neighbor and she gives you $10.

Barter system- A method of exchange when no money is involved.

B and C can't be the answers because they are not exchanging anything.

D can't be the answer either because there is money involved.

So your answer is A) You trade an apple for a banana at school. because you are exchanging something with someone for something else thats not money.

Hope this Helps!!

well, paralell is parallel. i am providing links to .

hope this !

a series circuit is one with all the loads in a row. there is only one path for the electricity to flow. if this circuit was a string of light bulbs, and one blew out, the remaining bulbs would turn off.

unlike in series circuits, a charge in a parallel circuit encounters a single voltage drop during its path through the external circuit. the current through a given branch can be predicted using the ohm's law equation and the voltage drop across the resistor and the resistance of the resistor.

a parallel circuit has certain characteristics and basic rules: a parallel circuit has two or more paths for current to flow through. voltage is the same across each component of the parallel circuit.

dude you should crop your image so only the question shows. but   can you explain it better