Final answer:
The mRNA and staufen protein are transported towards the + end by anterograde axonal transport mediated by motor proteins.
Step-by-step explanation:
The mRNA and staufen protein are transported towards the + end by a process called
anterograde axonal transport. This transport is mediated by motor proteins, such as kinesins, which move along microtubules. The motor proteins bind to cargo molecules, such as mRNA and staufen protein, and use ATP hydrolysis to generate the force needed for transport.