Redaction is not a course of cancer. Redaction refers to the process of editing or censoring information for publication.

"Icxting" does not appear to be a recognized term for a new type of communication. It is possible that it is a typo or misspelling of a different word or concept.

A mobile phone can be a useful tool for accessing educational resources and communication with peers and teachers, but it is unlikely to directly improve the marks of learners. Academic performance is influenced by various factors such as study habits, understanding of the material, and level of engagement in learning activities.