So let’s pause and think.
English is made from pieces of different languages. The Greeks had one letter, theta, to stand for a “th” sound, as in “earth.” So when you used your “ear,” you “heard” a sound like “earth” has. The Romans created our alphabet, so it uses “th” in place of the letter for “theta.”
Letters together in different ways make different sounds, just like colors mixed together make different colors. Red mixed with yellow makes orange, but red plus blue makes purple. A guitar and flute together make a different sound than a drum and a flute.
Just as colors, music, or even chemicals make specific results in different combinations, sounds come from different languages. They all come together, words and sounds from different times and places, written in one twenty-six letter alphabet. Each word needs sounds made from different rules. Just as people come from all over the world to make one America, sounds come from with meanings from everywhere---to create one English language!
(This is my write-up for my nine year old writing student. What do you think?)