Read this excerpt from A Black Hole Is NOT a Hole. Acting on the hint, scientists search the X-rays for patterns that most likely signal black holes. One pattern is an X-ray ring that seems to surround nothing. The nothing part might be a black hole. If so, the ring is energy released by super-heated matter spiraling just outside the event horizon. Which statement best identifies the type and use of description? The word is signals a characteristic of an X-ray pattern. The phrase most likely signals an example of an X-ray pattern.

What is the tone of this passage from andrew jackson's message to congress? "the consequences of a speedy removal will be important to the united states, to individual states, and to the indians themselves. the pecuniary advantages which it promises to the government are the least of its recommendations. it puts an end to all possible danger of collision between the authorities of the general and state governments on account of the indians." andrew jackson, annual message to congress on december 6, 1830" a. ashamed and apologetic b. intelligent and professional c. bitter and jealous d. entertaining and humorous