About 1.5 million species of fungi exist on Earth. They act as nature’s decomposers. These organisms break down matter and release enzymes and acids that unlock nutrients for plants and soil organisms. You may be familiar with macrofungi, a type of fungus that includes mushrooms. But for the most part, fungi exist as mycelia, tiny threads that snake underground in billions of interconnected threads. They twist and twine with tree root systems, helping tress obtain crucial nutrients. Mycologists call these networks of mycelia "Earth’s nervous system." Which statement best identifies the central idea of the paragraph?

A. Earth's many species of fungi act as decomposers of matter.

B. Fungi bring nutrients to tree root systems when they twine with them underground.

C. The type of fungus called macrofungi includes mushrooms.

D. Fungi exist as a web of threads connected underground.

Read this passage: there were old, half-rotten vegetables; bones from the evening meal, covered in white sauce that had gone hard; a few raisins and almonds; some cheese that gregor had declared inedible two days before; a dry roll and some bread spread with butter and salt. "am i less sensitive than i used to be, then? ", he thought, and was already sucking greedily at the cheese which had immediately, almost compellingly, attracted him much more than the other foods on the newspaper. quickly one after another, his eyes watering with pleasure, he consumed the cheese, the vegetables and the sauce; the fresh foods, on the other hand, he didn't like at all, and even dragged the things he did want to eat a little way away from them because he couldn't stand the smell. kafka, the metamorphosis (david wyllie, trans.) what can you infer about gregor from this excerpt? a. he enjoys disturbing his family by making a lot of noise. b. he is upset at being locked in the room and tries to escape. c. he is becoming less human and more like a bug. d. he is depressed and is trying to hurt himself.

(1) fire extended humans’ geographical boundaries by allowing them to travel into regions that were previously too cold to explore. (2) it also kept predators away, allowing early humans to sleep securely. (3) fire, in fact, has been a significant factor in human development and progress in many ways. (4) other obvious benefits of fire are its uses in cooking and in hunting. (5) probably even more important, however, is that learning to control fire allowed people to change the very rhythm of their lives. (6) before fire, the human daily cycle coincided with the rising and setting of the sun. (7) with fire, though, humans gained time to think and talk about the day’s events and to prepare strategies for coping with tomorrow. the sentence that expresses the main idea is: (type the number of the sentence. then click “go.”)

Which statement is an example of a complex sentence? a. although he denies them, dr. vasquez faced several scandals last year. b. people tend to use too many clauses in sentences that should be simple. c. cars tend to be expensive, but airplanes are in a price range of their own. d. i am in favor of proposition 1, and i am also in favor of proposition 16.