Widely accepted theory that explains transport of organic solutes in plants is supported by:

Explanation

The widely accepted theory that explains the transport of organic solutes in plants is the Pressure Flow Theory, also known as the Mass Flow Hypothesis. This theory describes how sugars (mainly sucrose) are transported from source tissues (where they are produced, usually leaves) to sink tissues (where they are utilized or stored, such as roots, fruits, or storage organs) through the phloem.