Meaning: A girl who is pleasant gave portions of her frozen dessert to other people while feeling happy.
Choice of Words: Using "The" as an article to refer to a specific girl. "Sweet" is an adjective that means having a pleasant taste or smell. "Girl" is a noun that refers to a young female child. "Shared" is a verb that means to divide and give out portions of something among several people. "Her" is a possessive adjective that refers to something belonging to a female person. "Ice cream" is a noun that refers to a frozen dessert made from cream, milk, and sugar. "Happily" is an adverb that means in a happy or contented manner.