The document discusses food transport in plants. It states that food is transported through the sieve tube elements of the phloem in a process that requires cellular energy. The phloem sap that transports food is a sugar solution. During growing seasons, sugars produced in leaves through photosynthesis are transported to growing points and excess is sent to roots for storage, while at the start of seasons food moves from storage regions to growing points, traveling either up or down the stem.