Read the passage. Coral reefs are inhabited by beautiful sea animals. But don’t let their good looks fool you because some are bad news. For example, the bite of the blue ringed octopus contains venom that is very harmful to humans. Once bitten, humans experience paralysis, serious breathing problems, and other symptoms. An octopus bite may be fatal if not treated right away.

Reread the sentence from the passage.

But don’t let their good looks fool you because some are bad news.

Which revision best expands the sentence to create a more formal style?

However, some of these creatures are both beautiful and dangerous.

Be careful though because things in the ocean aren't always as they appear.

Some may look amazing, but they can really be harmful to folks who get too close.

Just because an animal looks pretty to us doesn’t mean it’s friendly.