To solve this problem, we need to determine the direction of movement of sugars in the phloem.$\newline$Let's analyze the process:$\newline \bullet$Phloem is responsible for the transport of organic nutrients, primarily sugars, throughout the plant.$\newline \bullet$The movement of sugars in the phloem is known as translocation.$\newline \bullet$Translocation in phloem is driven by a pressure flow mechanism, which allows for the movement of sugars from source to sink.$\newline \bullet$Sources are typically photosynthetic tissues like leaves, where sugars are produced.$\newline \bullet$Sinks are parts of the plant that require or store sugars, such as roots, fruits, and growing tissues.$\newline \bullet$The direction of sugar movement can vary depending on the plant's needs, as sugars can move from leaves to roots or from leaves to fruits.$\newline \bullet$Therefore, the movement of sugars in the phloem is bi-directional, as it can occur in multiple directions depending on the source-sink relationship.$\newline$Thus, the correct answer is Option 4: Bi-directional.