The answer that will fit best in the question above is
gentrification. It is because this is the process of having to be able to do an
improvement or do some renovating in terms of a particular thing in which is a
way of developing something into a more middle class taste.
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!!
Its one of the answers in front of you and I think its C
Answer:
a thermistor or thermocouple thermometer
