Concept:A chamber of commerce represents all businesses in a locality, while a trade association is limited to one industry.
Explanation:A chamber of commerce is a voluntary group of business executives, traders, and entrepreneurs from different trades within a city or country.
It is not limited to a single branch of trade.
In contrast, a trade association consists of members who are engaged in the same trade or industry.
Therefore, the main difference is that a chamber of commerce is broader and covers many industries.
Answer:A. is not restricted to a particular industry.