The range of conditions under which an organism functions the best is that organisms

looks like the answer is     c     to me!

answerdendrites; blank(2) axons;

the cover letter for a job search includes the skills one has for the particular job. including a cover letter is always a good idea, as it describes the ability to perform a task, and the employer can easily fetch the intention of the job you want to do.  

the cover letter is very important to be included in the job search document. hence, i strongly with the statement.