A well worn, 105 year old cent... alloy as @Mr_Spud said. Cheers, RickO

You can do a quick and easy web search for information of the type that you asked about.
I typed in “1917-D cent composition” and the first result that came up was:

“1917 D Lincoln Wheat Cent - USA Coin Bookhttps://www.usacoinbook.com › coins › small-cents › 1...
1917-d cent composition from www.usacoinbook.com
41 items — Bronze Composite Penny ; Mintage: 55,120,000 ; Minted at: Denver ; Designer - Engraver: Victor D Brenner ; Metal Composition: 95% Copper - 5% Tin and Zinc.”

all.

Many thanks to everyone and also thanks to Markkelley
For his honor for sending the Red Book Uniited States Coins 2022
Note that I have this book, the problem is that some of the pictures were not clear to me, especially my English is weak, so I ask you to excuse me for what you have the knowledge and experience for this I asked you for help. Thank you everyone .
———————
Your were given a book that was very generous of a member and you still ask a question that can be found by reading it.

Before asking read the book like that proof dime question or just TROLLing us.

Since you have lots of time to post and take numerous photos you can read and do some independent research cannot you?

If you dont want to read and use the book mail it back to the sendet so he could give it to a more deserving member who will put it to good use,

Your Welcome.

@giantsfan20 said:

all.

Many thanks to everyone and also thanks to Markkelley
For his honor for sending the Red Book Uniited States Coins 2022
Note that I have this book, the problem is that some of the pictures were not clear to me, especially my English is weak, so I ask you to excuse me for what you have the knowledge and experience for this I asked you for help. Thank you everyone .
———————
Your were given a book that was very generous of a member and you still ask a question that can be found by reading it.

Before asking read the book like that proof dime question or just TROLLing us.

Since you have lots of time to post and take numerous photos you can read and do some independent research cannot you?

If you dont want to read and use the book mail it back to the sendet so he could give it to a more deserving member who will put it to good use,

Your Welcome.

If you’re going to pick on someone, please use better grammar, punctuation and spelling. And since the book was given to him as a gift, it’s his to do with as he pleases.