REIT stands for:

Real Estate Investment Trust is the correct term for REIT. This term refers to a company that owns, operates, or finances income-producing real estate in a range of property sectors. REITs provide a way for individual investors to earn a share of the income produced through commercial real estate ownership without actually having to buy, manage, or finance any properties directly. By pooling the capital of many investors, REITs allow individuals to invest in large-scale, income-producing real estate projects, making them an accessible avenue for real estate investment.

In contrast, the other options do not reflect the established definition or function of a REIT. The term "Real Estate Investment Task" and "Real Estate Investment Trade" do not exist in the industry and would misrepresent the nature and purpose of these investment vehicles. "Real Estate Income Trust" is somewhat close but not the standardized term used in the field, which is specifically "Real Estate Investment Trust." Understanding the correct terminology is essential for engaging with real estate investment and finance effectively.