The statement has a "Region-Specific Risk" section on Page 4 that lists countries with higher risks for modern slavery. "Vulnerable Groups" section on page 4 also recognizes specific groups which are vulnerable to modern slavery. The company acknowledges that vulnerable groups and region-specific risk will require further partnerships to reduce and prevent any human rights risks.
While the document does not clearly specify which industry present the greatest risk of modern slavery, it mentions about site-specific modern slavery (5).
Responsible Minerals Sourcing on page 7 of the statement recognizes "conflict minerals are often correlated with instances of modern slavery (7)." Amazon commits to avoid any conflict minerals and the company is also making their Suppliers to be accountable for identifying high-risk minerals.
Yes, the company identifies Workforce and geographical risks and manufacturing risks (p. 4)
Regarding minerals they do identify specific high-risk ones:
We expect Suppliers to support our efforts to identify the origin of high-risk minerals, including gold, tin, tungsten, and tantalum, used in Amazonbranded products. (p. 7)