＂1. Headline suggests an answer

2. Content of article delivers the actual answer＂

that's literally the definition of click bait .... They bait you into clicking to get the answer

They could have instead changed the title to include the answer

"Scientists discover the death of dozens of endangered elephants was due to blood poisoning"

But then no one would click, bc most people wouldn't care to learn more. And then the Guardian wouldn't get its sweet sweet ad revenue