The loading of dissolved sugars into the sieve tube elements of phloem is:

A) passive transport.
B) active transport.
C) osmosis.
D) simple diffusion.
E) facilitated diffusion.

Sieve Tube Elements

Specialized cells in the phloem of vascular plants that are responsible for transporting sugars and other metabolic products downwards from the leaves.

Active Transport

The movement of molecules across cell membranes against their concentration gradient, requiring energy typically in the form of ATP.