Answer: A. What they produce
Step-by-step explanation:
Industries are known to be group of companies which deal with the production of goods (products) and services. They make raw materials to pass through the production process and change them to specific goods. Also, they are categorized according to what they produce. For example: phone industries produces phones, pharmaceutical industries deal with the production of drugs, textile industries produces cloth and so on. Thus, these industries can be established by private sector or public sector.