Answer:
The corrects answer is option B.
Explanation:
The phloem is a structure present in the plant that helps in the translocation of the sugar, amino acids and other material from a source and the sink. This concentrated solution is known as sap. The translocation of the sap is bidirectional in the phloem. The site from the material move called source and the destination is known as the sink.
The driving force for the translocation of the materials is translocated by the pressure potential gradient between the source and the sink sites. It is a mode of active transport.
Thus, the correct answer is option B.
