Cinco de mayo is a federal holiday in mexico.

Answer (a) the itcz comes overhead for part of the year; i believe this is correct,plz check first; ///

Answer (d) may increase or decrease porosity through dissolution or deposition;

It is useful for historians to write narratives so that history can be passed on from their point of view.  think about a story being told in third person, then think about it again being told in first person, by someone who actually experienced the event.