What event marks the beginning of Earth's current era? O A. The emergence of human life
O B. A mass extinction
O C. The disappearance of land bridges
O D. The end of the last ice age

? you expect us to answer this? ? this is your schoolwork, i don't think we can with this, i think it would considering being

explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.