Choose the synonym (similar meaning) of the word:
Ossified

The correct answer is (a) Harden.
Explanation:
"Ossified" means to become rigid or inflexible, often referring to ideas or habits. "Harden" is the closest synonym, while the other options are related to flexibility or softness.
Meanings of all options:
· Harden: To become rigid or firm.
· Amenable: Open to suggestion or easily persuaded.
· Docile: Ready to accept control or instruction.
· Pliant: Easily bent or flexible.
Correct sentence:
"The correct synonym of 'ossified' is harden."