Which of the following pairs of letters is used in the context of "push up and over" for teaching purposes?

The correct answer highlights a specific grouping of letters that is relevant when teaching certain phonetic or grapheme concepts. In the context of "push up and over," the use of letters such as 'm', 'n', 'v', 'x', 'y', and 'z' is significant because these letters can demonstrate particular phonetic qualities and instructional strategies that facilitate understanding of letter formation and orientation.

Specifically, the phrases "push up and over" can refer to the physical movement involved in writing or forming letters where this instruction is particularly relevant for letters that have similar structural features. For instance, many of the letters in this group involve upward strokes or can easily be connected in writing through a process that mimics an upward motion before looping down or transitioning to subsequent letters.

The other groups of letters consist of letters that either do not employ the same physical movement or instructional cues associated with "push up and over." Such distinctions are crucial for teaching approaches focused on kinesthetic learning, where physical movement contributes to letter recognition and writing skills. Therefore, the choice presented is aligned with effective strategies for letter formation that enhance the learning process for students.