Answer: B
Explanation: Traits usually die off when they are unneeded by the organism, or if the trait causes harm to the organism's survival. Through natural selection, over time, the organisms with the best combination of traits for its survival will become the dominating species, and those with weaker traits may not survive long enough to pass off their traits to future offspring.
<h3><em>Cell</em> </h3>
The smallest unit that can carry on all the processes of life is a cell.
White blood cells ( lymphocytes is correct though)
The portion of the pharynx that receives air from the internal nares is the nasopharynx.
Hope this helps!
-Payshence xoxo
