What is the blue line on this ovary of sec microscope slide?

__1__ is a climate cycle where the temperature of the __2__ ocean changes because of movements of air and ocean currents. during this period, the trade winds in the south __3__ , causing the __4__ water to move from the __5__ region to the __6__ region. 1) el nino or the monsoon 2) atlantic, indian, or pacific 3) reverse, strengthen, or weaken 4) cold or warm 5) eastern or western 6) eastern or western

Hey me with this one❤❤❤❤ every organism needs food. does a cell also need it? explain very briefly.

Why is it important to study each branch of earth science?