Mantle plumes are areas of hot, upwelling mantle and hot spots develops above these plumes as noted in the map above. magma generated by the hot spot rises through the rigid plates of the lithosphere and produces active volcanoes at the earth's surface. as oceanic volcanoes move away from the hot spot, they cool and subside, producing islands, atolls, and seamounts. as the magma cools in the water it forms rocks

option a is correct i.e.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

just here for the other one bc they put up with u

a. seed plant structure. 1. the three main plant organs are roots, stems, and leaves. a fourth kind of tissue, meristematic tissue, is responsible for plant growth. meristematic tissue is the only plant tissue that produces new cells by mitosis. plants can lose water out of their leaves as they exchange gases with the air

explanation: