Read this excerpt from a persuasive essay about animal testing. Which two sentences form a hook to draw the reader’s attention? Somewhere in a claustrophobic laboratory a dog is forced to breathe tobacco smoke. In another lab in another part of the country, a rat is squeezed into a narrow glass tube and forced to breathe in tobacco smoke. Scenes from a horror novel? No, all of this is real. Modern technology has advanced to new heights. Yet scientists continue to perform cruel and painful experiments on innocent animals all in the name of progress. Moreover, most of these experiments on animals have ended up being worthless—scientists don’t even have a good reason to continue with them. We must put an end to it before more animals are harmed.It is time we show humanity to our fellow creatures.

In claustrophobic laboratory a dog is forced to breathe tobacco smoke.
In another lab, a rat is squeezed into a narrow glass tube and forced to breathe in tobacco smoke.

Both of these sentences hook to draw the reader's attention.

These are such cruel acts done by scientists, action shall be taken against such insane work. Tobacco is so damaging to humans, then just imagine its consequences on these poor animals. Bioethics rules shall be kept in mind before doing such cruel acts.