Answer:
Option (B)
Explanation:
Alto-Cumulus is the type of middle atmospheric clouds that generally appear to be puffy and often look like floating cotton pieces. These clouds usually have a flat base and range from 2000 to 6000 meters above the ground surface. The apex of these clouds has rounded. They are commonly found between the warm front and cold front within a depression. They are mostly hidden by the clouds that are at a comparatively lower height. These clouds do not undergo precipitation.
Hence, the correct answer is option (B).
Explanation:
Given the importance of oxygen for animals, researchers suspected that a sudden increase in the gas to near-modern levels in the ocean could have spurred the Cambrian explosion. ... This supported the idea of oxygen as a key trigger for the evolutionary explosion.
6. Hard engineering manages costal zones in order to protect high value areas from flooding or falling into the sea through erosion example: a sea wall which will be strong to protect
7. C is stack and I can’t really see B and A
