___allows adapted organisms to survive and pass traits along to offspring. a
Evolution
b
Artificial selection
c
Extinction
d
Natural selection

I think it's D.Natural selection

Explanation:According to Charles Darwin's theory of evolution by natural selection, organisms that possess heritable traits that enable them to better adapt to their environment compared with other members of their species will be more likely to survive, reproduce, and pass more of their genes on to the next generation.

the answer for apex is "1 and 6"

yes its like the dead sea which is full of salt which makes you stay afloat

so yes an egg will float in salt