Triunghiurile echilaterale ABC și BCD sunt situate în plane diferite, iar E este mijlocul
laturii BC. Demonstrați că BC 1 (ADE).(dau coroana )​

the answer is; biodiversity resulting from few ancestors

adaptive radiation occurs when a population is subjected to a large natural environment with spatial ecological variations. the parts of the population in the different ecologies begin to adapt to their local environments. due to non-random mating across the large populations, this causes the different populations from the large population to speciate within their local environments. they, therefore, diverge to different species sharing a common ancestor.  

the answer is a.

step-by-step explanation:

in three games of golf, alex shot two under par four times.