Answer:
The definition of the word foul:
1. This can be used to describe a play that doesn't count in a sports game.
2. This can be used to describe something very disgusting or gross.
Answer:
Root words are parts of words which cannot be divided any further, but which have some kind of meaning on their own. Here, I believe that root words are cred, graph, and vis.
Cred (as found in credible, credibility), means something believable; graph (as in graphic) means to write; vis (as in visible) means to see. Anti, con, and post are all prefixes, which means they are added to words and cannot be root words thus.
When you write about yourself
Answer:
Some of Mexico’s rivers are the Grijalva, the Usumacinta, and the Conchos.