Question

When speakers change the meaning of a sentence by shifting the emphasis from one word to another they are using?

Answer 1

I think it would be considered pronunciation.

Answer 2

Intonation.

Step-by-step explanation:

Intonation is "the pattern or melody of pitch changes in connected speech, especially the pitch pattern of a sentence, which distinguishes kinds of sentences or speakers of different language cultures."

Using right intonation in a sentence is vital to convey the meaning that author wants to assert.