163. The process that explains the recent changes in the height of sea level in coastal areas of eastern and northern Canada and Scandinavia is

A. isostasy
B. continental drift
C. plate tectonics
D. None of the above
✅ The correct answer is option A.
The process that explains the recent changes in the height of sea level in coastal areas of eastern and northern Canada and Scandinavi is isostasy.

167. The most recent era of the geological time scale is

A. Mesozoic
B. Cenozoic
C. Triassic
D. Paleocene
✅ The correct answer is option B.
The further subdivision of the eras into 12 “periods” is based on identifiable but less profound changes in life-forms. In the most recent era, the Cenozoic, there is a further subdivision of time into epochs.