Help me quick please!! Aldo is writing an essay on the similarities and differences between local hummingbirds and those that live one hundred miles away. Based on his research, he has several concepts he needs to explain to readers.

Which organizational strategy should he use to structure his essay?

A.
definition
B.
classification
C.
cause and effect
D.
comparison and contrast

d is the correct answer comparison and contrast

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).

do you have any answer choices ? ?

explanation: