The most accepted theory regarding the make-up of living things is the
organismal theory
cell theory
chromosomal theory

The most accepted theory regarding the make-up of living things is the cell theory.

It was proposed by German scientists Theodor Schwan, Mathias Schleiden and Rudolf Virchow.

It states that;

1. All living organisms are made of cells.

2. The cell is the basic unit of life.

3. Cells arise from pre-existing cells.

in addition the modern version of the cell theory states:

4. Energy flow occurs within cells

5. Heredity information (DNA) is passed from cell to cell.

6. All cells have the same basic chemical composition.

the answer is :