PLEASE HELP! THIS IS VERY IMPORTANT!

What is the ecological role of food chains and food webs

Cpr, or cardiopulmonary resuscitation, is a first-aid technique to save lives. it involves compressions of the patient's chest cavity. which description is the best description of the functions of chest compressions in cpr? chest compressions are done to pump the heart. chest compressions are done to strengthen the rib bones. chest compressions increase carbon dioxide inhalation. chest compressions allow the patient's muscles to wake up.

Closing romer’s gap. what is the significance of the new fossil evidence found in scotland? answer in claim evidence and reasoning