The answer is b. This is the answer because sometimes the hands free devices can be more dangerous than phones
B ~ You cannot tell if someone was touching your hand
Hope this helps! ^^
Answer: Coral reefs are important to the ecosystem because they are the pillars on which marine and coastal ecosystems are built. They keep plants, fish, and animals fed. They clean up our water and protect our coasts.
Explanation: Hope it helps :)
Answers 1-15. I didn’t know if you needed a letter or not so I just put it just in case.