Ötzi arrived in 1991 bearing gifts from a much earlier time. His well-preserved body

was discovered in a receding Italian glacier, and it became the subject of intense study.
Researchers learned from that analysis that it was difficult to live five thousand years
ago. Ötzi showed signs of having endured arthritis and other afflictions, and there was an
arrowhead in his shoulder. But his copper ax showed that people were somewhat
advanced. His tattoos suggested value was placed upon ornamentation or the use of
acupuncture, a practice previously thought to have begun two thousand years later.
Researchers have unlocked much about human evolution from the key that Ötzi handed
them.

What is the author suggesting by saying that Ötzi arrived bearing gifts?
The scientific evidence gleaned from the discovery gave researchers insights that they did not possess before.
Ötzi and the artifacts that were found with him were doubtlessly worth a great deal of money for those who found him.
Evidence from the discovery suggested that Ötzi was carrying gifts at the time of his unfortunate death years ago.

The author is using figurative language to describe the valuable insights and knowledge gained from studying Ötzi and his preserved body. The "gifts" refer to the wealth of information and scientific evidence that Ötzi provided to researchers about human evolution and life in the past.