I would say the answer is “Repair”
Explanation:
Cave lions, sabre-toothed cats, cave bears, giant deer, woolly rhinoceroses, and woolly mammoths were prevailing species of the Quaternary period. Without the dinosaurs, plant life had an opportunity to flourish during the Cenozoic era.
Immunity is our bodies natural response to resisting disease. Immunglobulins work by detecting pathogens and destroying them before they cause disease.