The sentence that contains a verbal phrase acting as a modifier is: Giving a presentation in front of my class, I suddenly developed sever stage fright.
Modifiers are optional elements in a phrase structure that even when removed, it does not affect the whole grammar of the sentence.
Answer:
The Niagara movement was established in 1905. It was led by civil rights leaders such as W.E.B. Du Bois and William Monroe Trotter. Their mission was to affect political and social change for African Americans. They sought to end institutional injustices and to expand economic and educational opportunities for Black Americans. The group's efforts led to the formation of the National Association for the Advancement of Colored People (NAACP) in 1909. Note that the language of the speech is representative of the time period in which it was delivered. Some words and phrases are no longer appropriate.
The correct answer among the choices provided is option A. Putting punctuation marks at the end of each sentence is an example of a grammar rule. A grammar is a set of standard rules about composition in a language. Some fields under grammar are morphology, phonetics, and syntax.
That is a sentence fragment