HOW IS THE LETTER O PRONOUNCED WHEN IT USED AT END OF A WORD TO CREATE PLURAL FORM?

The letter "O" at the end of a word to create the plural form is not pronounced.

For example:

* Photo becomes Photos (pronounced "foh-tohz")

* Piano becomes Pianos (pronounced "pee-ah-nohz")

* Echo becomes Echos (pronounced "ek-ohz")

This is a common pattern in English, where the "o" is silent in plural nouns ending in "s."