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.
Answer:
C.......................................
Answer:
Brain drain is one of the earliest phenomena associated with globalisation, which has significant adverse effects at the local level.
The departure of skilled workers can weaken developing countries, especially smaller ones, by depriving them of important skills and workforce.
Answer:
Lyre
Explanation:
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