Answer:The Earth's lithosphere is relatively hard rigid-like whereas, the asthenosphere is relatively hot and plastic-like
Explanation: The surface of the lithosphere has the rocks which can bent but does not flow , that is having rigid nature whereas the asthenosphere has comparatively have a flow in nature and are considered as plastic-natured .The lithosphere is segmented into rigid plates that are present on top of the flowing asthenosphere.
It is stated that the hard rocks don not flow while the flow can be seen in the plastic -like rocks.
One astronomical unit is equal to the distance from Earth to the Sun. The second option among all the options given in the question is the correct option. The distance as calculated in the year 2012 by the International Astronomical Union was equal to 149597870700 meters. Astronomers like to use this unit for measuring the distances between planets and other solar bodies.
