Can I please have a definition for consumer competitors intermediaries suppliers and labour union?

Consumer: An individual or group that purchases goods or services for personal use.
Competitors: Businesses or entities that offer similar products or services and vie for the same customer base.
Intermediaries: Entities that facilitate the distribution of products from producers to consumers, such as wholesalers and retailers.
Suppliers: Companies or individuals that provide goods or services to another business, often as part of the production process.
Labour Union: An organized group of workers that collectively negotiate with employers to improve wages, working conditions, and other employment terms.