It is recommended that a letter of recommendation for college admissions come from

The answer is: From a teacher that has seen you improve.

Letter of recommendation from teacher that seen you improve would give the perception that you are a person who had experience a lot of hardships during your school years, but you still manage to struggle and make improvements to your life.

This characteristic would be seen as favorable by workers in college admissions office and improve your chance of getting an interview with them.

rocks and weathering-matching

the answer for this question would be d. glaciers