It is the same as the mark placed above: a diacritic, or diacritical mark.
The symbol you are referring to is called a "cedilla." It is a diacritical mark placed under the letter "c" to indicate a soft "c" sound, as in the word "ç" in French, Portuguese, and Catalan.
A tattle.The cross through the "t" is called a tattle. Also, the dot above a lower case "i" is called a tittle.
streak.
The two dots over the letter "o" are called an umlaut. This diacritical mark is used in German and other languages to indicate a change in pronunciation, typically altering the sound of the vowel. In some contexts, such as in Hungarian or in certain loanwords, it can also be referred to as a diaeresis.
Chemicals used to mark territorial boundaries are called pheromones. These are secreted by animals to communicate with others of the same species about the boundaries of their territory, their mating status, or to warn of danger.
n.A mark ( ¸ ) placed beneath the letter c, as in the spelling of the French word garçon, to indicate that the letter is to be pronounced (s).
The symbol you are referring to is called a "cedilla." It is a diacritical mark placed under the letter "c" to indicate a soft "c" sound, as in the word "ç" in French, Portuguese, and Catalan.
A colon is placed after "Dear" in a business letter, not after "The."
comma
An umlaut is a diacritical mark placed over a letter consisting of two closely-placed dots. (¨) Or the sound produced by such a diacritical mark.
The "N" mark in Spanish is called "virgulilla" or "tilde de la eñe." It is a diacritic mark that is placed over the letter "n" to indicate the sound /ɲ/ in words like "señor" or "español." It distinguishes the pronunciation of the letter "n" from a regular "n" sound.
colon colon
A comma is placed after the greeting in a friendly letter.
The proofreading mark for lowercase is a caret symbol (^) placed below the letter that needs to be lowercase.
A 'cedilla' is a mark used in French to indicate that the letter 'c' should have a 'soft' sound, i.e., that it should be pronounced like the letter 's.' The cedilla resembles a comma and is placed under the 'c.'
there is no mark or letter
The ' symbol is called an apostrophe. When it is placed over a letter in a name, it is usually used to indicate the omission of a letter or letters, such as in a contraction (e.g., "don't" for "do not") or a possessive form (e.g., "John's house").