Which type of real estate investment focuses on properties built for people to live in?

The correct answer is focused on properties specifically designed for people to live in, which includes single-family homes, townhouses, condominiums, and multi-family housing units. Residential real estate investment emphasizes shelters for individuals and families, reflecting the need for housing in various forms. This category covers a vast market and can range from affordable housing to luxury residences, allowing investors to tap into different segments based on demand and market conditions.

In contrast, commercial real estate primarily includes properties used for business purposes, such as office buildings, retail spaces, and shopping centers. Industrial real estate refers to properties used for manufacturing, warehousing, and distribution, which cater to businesses rather than residents. Agricultural real estate involves land used for farming and the production of food and crops, further distancing it from residential purposes. Thus, the focus of the question on properties meant for living makes residential the most appropriate choice.