What is the primary difference between primary active transport and secondary active transport?

Primary active transport requires no energy input, while secondary active transport requires ATP hydrolysis.

Primary active transport is directly driven by ATP hydrolysis, while secondary active transport is driven by an electrochemical ion gradient.

Primary active transport moves molecules with their concentration gradient, while secondary active transport moves molecules against their concentration gradient.

Primary active transport occurs only in prokaryotic cells, while secondary active transport occurs only in eukaryotic cells.