Specific molecules combining form what?

Molecules are the fundamental building blocks of matter and combine to form cells. Cells are the smallest units of life and represent a complex assembly of organic molecules, including proteins, lipids, carbohydrates, and nucleic acids, that come together to execute various biological functions.

When specific molecules join together, they often form macromolecules, which then associate to create cellular structures such as organelles. These organelles perform individual functions within the cell, but it's the combination of various macromolecules and structures that ultimately defines a cell.

While tissues are comprised of groups of similar cells working together for a common function, and organs consist of different tissues collaborating to accomplish specific tasks, the direct progression from molecules occurs at the level of cells. Thus, the correct answer to the question is that specific molecules combining ultimately form cells.