Final answer:
The main forms of business organizations are proprietorships, partnerships, corporations, and limited liability companies (LLCs) and limited liability partnerships (LLPs). Businesses are frequently started as proprietorships and then convert to corporations when their growth results in disadvantages outweighing advantages.
Step-by-step explanation:
The main forms of business organizations are: 1) proprietorships, 2) partnerships, 3) corporations, and 4) limited liability companies (LLCs) and limited liability partnerships (LLPs). Businesses are frequently started as proprietorships and then convert to corporations when their growth results in disadvantages outweighing advantages.