Question

read the text.
among american robins, the female does most of the nest - building. she starts by selecting a good site. usually, this is a place protected from rain, wind, and sun, often on tree branches hidden by leaves. then, using grasses and small twigs, she forms a cup - shaped nest. after forming this cup, the robin adds mud to reinforce it and cement it to its location on the tree branch or other base. finally, she lines the nest with soft grasses and hairs. all this usually takes about five or six days, and it results in a fine home, about six to eight inches across and three to six inches high.
which organizational structure does this text primarily use?
cause - effect
compare - contrast
sequential

Explanation:

The text describes the nest - building process of female American Robins. It uses words like "starts by", "Then", "After", "Finally" to show the order of steps in the process. Cause - effect would focus on reasons and results of an event, and compare - contrast would highlight similarities and differences between things, but here the text is about a sequence of actions, so it's sequential.

Answer:

sequential