Please someone help me I am so confused for question. what do I do?

How does the author's purpose in this passage differ from an author writing about her personal struggle living with asthma?

What is the next step in muscle contraction after the actin changes shape? (apex)

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.