Translocation is not carried out by phloem. Phloem is responsible for the transport of organic nutrients, such as sugars and amino acids, from the leaves to other parts of the plant, including the roots, stems, and fruits. Translocation refers to the movement of these nutrients through the phloem. It occurs through a process called mass flow, where the nutrients are actively transported from source regions (areas of high nutrient concentration, such as leaves) to sink regions (areas of low nutrient concentration, such as growing tissues or storage organs).