Question

why would an alloy steel chain be removed from service?
damage from cool temperatures
missing identification tag
rust - free surfaces
the sides of the links are straight

Explanation:

An alloy steel chain would be removed from service if it has a missing identification tag. Identification tags provide crucial information about the chain's specifications, load - bearing capacity, and safety ratings. Without this tag, it is impossible to ensure that the chain is being used within its safe operating limits. Cool temperatures do not typically damage alloy steel chains. Rust - free surfaces and straight link sides are signs of a well - maintained chain, not reasons for removal.

Answer:

missing identification tag