A 1468

A dive attack has similar mechanics to a charge but it does not count as a charge, nor have the bonuses or penalties of a charge. The game authors wanted to avoid having to repeat those (clear path; line of sight; no 5' step; & c.) common movement restrictions.

A 1470 No.

A Wizard knows only the spells they can prepare and cast. The text uses the term "understand" rather than "know" when referring to scribing a spell into a spellbook (see Player's Handbook on pages 178-179).

A 1471 N/A.