Explain how Fugard uses Sam's character to convey the central idea of "Master Harold"... and the
Boys. Please help me

answer:

Sam is a middle-aged black man who works at St. George's Park. He has worked for Hally's family for years, and is educated, smart, and patient. He has a deep friendship with Willie and is like a father figure to Hally. He is understanding but he also has a breaking point. Race complicates Sam's relationship with Hally, and by the end of the play, he experiences profound disillusionment with the petulant teenager

Explanation:

his tongue, i believe, was bloody and hanging out of his mouth.

he looked as if he were hungry.

he has several wolf-like qualities; a gray coat, sharp claws and yellow fangs.

those eyes made me feel, dear reader, like the end was near.

as i reached for a stick, he moved to the other side of the hill.

panting and hungry, he looked at me, a defenseless human and he snarled.

well i said my prayers, however, he simply turned and limped off. 

the noun in this is person