Final answer:
Jacob gave Joseph a coat of many colors, which symbolized his favoritism and led to Joseph's brothers' jealousy and actions against him.
Step-by-step explanation:
The gift that Jacob gave to his favorite son Joseph was (A) A coat of many colors.
This is detailed in the Bible, in the book of Genesis. Joseph, being the favored son of Jacob, also known as Israel, received a richly ornamented coat from his father, which sparked jealousy among his brothers.
This coat is often interpreted as a symbol of Jacob's favoritism towards Joseph and plays a central role in the events that lead to Joseph being sold into slavery by his brothers.