Question

Which statement accurately describes the levels of organization? A group of cells that work together to perform a common function is called an organ. A group of tissues that work together to perform a common function is called an organ. A group of tissues that work together to perform a common function is called a cell.

Answer 1

It is the second sentence. Organs are made up of tissues. Tissues are made up of cells.

Answer 2

It's #2.
Organelles make up cells, cells make up tissues, tissues make up organs, organs make up organ systems.