According to stratigraphy and its laws, what is the correct order—from oldest to youngest—of the following rock strata:

B, C, D, A
D, C, B, A
B, C, A, D
A, B, C, D

Some mining processes involve removal of large areas of earths surface in the mined region this practice causes severe environmental damage by allowing which natural process to accelerate in the affected areas? a.precipitation b.erosion c.migration d.condensation

Name the organs of humanelemintary canal.

Where is the nictitating membrane found? a. between the eyelid and the eyeball b. between the retina and the optic nerve c. between the outer and middle ear d. in the organ of corti in the middle ear