The moon has to be in the full moon phase during a lunar eclipse. The correct option among all the options that are given in the question is the first option or option "a". when the earth is in between the moon and the sun, lunar eclipse occurs. I hope the answer will help you.
Researchers found a total of 138 volcanoes in the West Antarctic Ice Sheet overlying the West Antarctic Rift System, 91 of which had never before been identified. Basically they have never seen those types of volcanoes before.
