This would be a perfect example of the system of barter as you are trading one book for the other. You can see from here what barter is, a trading system which involves direct exchange of goods without some kind of medium of exchange, for example money. Services can also be traded this way.
Answer:to combat something something
Explanation:i just did it
This activity help the children to understand the concept of
compound words. Compound words are comprise of two or more words
that are joined to make a new term with its own significance. The smaller words
that form a compound word are like mystery pieces you appropriate together to make
a new finer picture. For example snow and man, the compound word now is
snowman.