Answer:
Professor Spiegelman is encouraging his students to use distributed learning.
Explanation:
The question is not complete since it does not provide the options to answer it, here are the options:
a) the whole method.
b) massed practice.
c) the serial position effect.
d) distributed learning.
e) SQ4R.v
The distributed learning process helps people to bear in mind the information since they have constant contact with it and it gives the chance to reinforce and see the information in any time not only in the classroom or in any moment that this is presented to the students, reviewing each other day makes the brain send the information to a long term memory.
The primary problem is the greenhouse effect. Greenhouse effect is when some gases (including CO2) absorbs some portion of sun's heat to make the atmosphere warm to support life. But when the amount of CO2 etc. increases in the atmosphere, it heats up more than it is required. So, by limiting CO2 emission, we can solve this problem.
pot·pour·ri
/ˌpōpəˈrē/
noun
a mixture of dried petals and spices placed in a bowl or small sack to perfume clothing or a room.
a mixture of things, especially a musical or literary medley.
Therefore, the phrase "a beautiful potpourri..." or mixture "...of differences" means that whatever this line is referring to is a pleasant mixture of many different things.
Hope this helped.