The heart is an example of which level of organization within an organism

The correct answer is - organ level organization.

Explanation:

The heart is made up of various types of tissues that include muscle tissue, nerve tissue, and blood tissue. All these types of tissues are organized to form the organ level organization which makes the heart is an organ.

Tissues are made up of cells and organs are made up of tissues and various organs combine together to do a specific function, this is an example of an organ system.

Thus, the correct answer is - organ level organization.