Answer:
The correct option is a
Explanation:
From the question we are told that
The mass of the block is 
The height of the vertical drop is 
Generally from the law of energy conservation , the potential energy at the top of the slide is equal to the kinetic energy at the point after sliding this can be mathematically represented as
i.e 
=> 
=> 
=> 
This correct answer would be C
<span>It's A. Individuals with traits NOT suited for survival DON'T pass their traits to their offspring, because they don't survive and they DON'T HAVE OFFSPRING. That's why, after a while, most of the living individuals have traits that ARE suited for survival. THAT's what evolution says. It says nothing about individuals changing. Note this not my answer its the answer of the guy up above who wrote it in the comments instead of in an answer!</span><span />
