I WILL MARK BRAINLEST PLEASE HELP

Read this line from the text:

The lionfish has targeted our most fragile and important ecosystems.

What does fragile mean in this sentence?
Frail
Flexible
Resilient
Substantial

Coming to school each day, having the necessary materials, and to do homework students to be successful in school. choose the answer that is the most effective substitute for the underlined part of the sentence. if no substitute is necessary, choose ‘leave as is.’ a) leave as is. b) coming to school each day, have the necessary materials, and do homework c) come to school each day, having the necessary materials, and to do homework d) coming to school each day, having the necessary materials, and doing homework

He united states can produce 200 pillows in one week, while spain and france produce 150 and 100 pillows, respectively, in one week. on the other hand, spain can produce 10 televisions in one week, while the united states and france produce only 5 and 4 televisions, respectively. has an absolute advantage in producing pillows, and has an absolute advantage in producing televisions.

Use any method to combine the following sentences into one sentence. elvis presley died in 1977. his music is still popular today. graceland in memphis was his home.