Answer:
A) sea level drops; land subsides
Explanation:
The sea is the final destination of all streams on land. All streams empty into seas which are the basins that collects all terrestrial materials.
The base level is the lowest level to which a river can erode its channel. The base level is greatly influenced by what happens to a sea.
When a river reaches its base level, erosion ceases. If a river is young and set above its base level, we see a rapid rate of erosion.
A sea, the final basin of depostion of rivers controls the base level to a very large extent. When there is a tectonic movement and a sea subsides. It becomes more deeper and lower. Sea level also falls and materials grades seaward. A river would cut rapidly along its channel and its bed to measure up to the level of the ocean.
Therefore, we see a very rapid rate of erosion of channels when sea level falls and the earth sags downward. This would lead to a lower base level.
When sea level rises and there is a tectonic uplift, rivers erode their channels less and begins to aggrade materials. The base level also rises.
Answer:
The key concept of death and rebirth cycles (reincarnation) in Hinduism is expressed in this sacred text : Upanishads .
Explanation:
Upanishads -
The concept of samsara which explains the cycle of life has roots in Vedic literature , but this theory is not discussed in it . It appears as a developed form , but without any mechanistic details , in early Upanishads
And , Although the concept of rebirth has been mentioned in hind literature as old as Vedas ( Rigveda ), it has been dealt in much detail in Upanishads .
20 feet (i searched internet)
This is due to the movement of the Earth: not the Sun is moving, but Earth is moving (this is what was discussed in the Heliocentic/Geocentric models in middle ages);
the Earth rotates counter-clockwise (as seen from the North Pole) which means that the points on the Earth move relative to the Sun.