What are the difference between a homophone and homo graph?

You're close! It's actually homophone and homograph, not homo graph. Let's break down the difference:

Homophones are words that sound the same but have different spellings and meanings.

* Example: "there," "their," and "they're" all sound the same but have different spellings and meanings.

Homographs are words that are spelled the same but have different meanings and sometimes different pronunciations.

* Example: "bow" (a knot) and "bow" (to bend at the waist) have the same spelling but different meanings and pronunciations.

In short:

* Homophones: Same sound, different spelling and meaning.

* Homographs: Same spelling, different meaning and sometimes different pronunciation.