$A$ plant organ having a high concentration of food will serve as a

During translocation,the carbohydrates are relatively richer in:

If a stem is girdled,what happens?

Analogy type questions:
$(1)$ In Xylem : Vessel :: In Phloem : ..........
$(2)$ Synthesis of food : Source :: Regions of need : ...........

Consider the following statements and choose the correct option from the codes given below:
$I.$ Loading of phloem is related to the increase of sugar in phloem.
$II.$ Active loading of sugar in the sieve tube of phloem is driven by a proton pump.
$III.$ Pressure may be positive or negative in sieve tube cells.
$IV.$ Water and solutes move through the sieve tube against the pressure gradient.
$V.$ Cytoplasmic strands pass through the holes in sieve plates and form continuous filaments.

Identify the pathway of food transport in plants.