C)love is often demonstrated through personal sacrifice *apex*
the answer is: C. After 20 years, rusted beams in buildings will cause them to start collapsing.
Chronological structure refers to a technique that put events in proper sequence starting on the earliest time to the latest. The phrase 'after 20 years' indicate the author first explain the situation before the 20 years process occurs and continue in proper sequence to explain what happen next.
The claim refers to the assertion of something commonly without proof or evidence.
When writing an essay claims are generally made out of cultural common knowledge which is shared with the readers. An essay consisting of just common knowledge doesn't attract readers or interest them by stating what is obvious.
When providing a claim evidence is necessary which asserts "how do you know?"
Hence in the above claim, evidence which best supports is many animals die prematurely in zoos because they are exposed to infectious diseases.
As the claim declares the condition of the zoo for improving health conditions and safety. Due to unhealthy conditions animals die prematurely due to infections and diseases.
