Read the passage. Choose the correct answer for each question.

"There are more fossils than I'll ever be able to count in New Mexico," said NAME_1, a paleontologist at the New Mexico Museum of Natural History and Science. He was commenting on the discovery of a fossil found in the New Mexico desert in November, 2016.

While exploring the region's Organ Mountains with his parents and two brothers, nine-year-old NAME_2 tripped over something sticking out from the earth. He immediately showed his brother, NAME_3, who said it was just a cow. "l didn't know what it was," said NAME_4. "l just knew it wasn't usual."

The find was in fact not a cow, but a stegomastodon, a prehistoric mammal. Later that night, NAME_4's parents reached out to Professor NAME_5. He and the NAME_6 family returned to the discovery site, finding an entire skull. 

Coming across a stegomastodon fossil is a rare find. Fossils like those belonging to mammoths are relatively abundant in western portions of North America, but for unknown reasons, stegomastodons are less frequently found. Only a couple hundred have been found in the world.

Researchers don't know how many fossils lie buried in the desert, but if they're to be found anywhere in the U.S, New Mexico is a likely location. The region's naturally dry, rocky terrain created conditions needed to preserve bones. In interviews with local news, the NAME_6 family said that recent rains in the area before the discovery might have helped expose the fossil. As rain softens and loosens the earth, more discoveries in the area are always possible.

Question:
1. What would be a good title for this passage? 
(a) Family Finds Mysterious Mammoth
(b) Professor Discovers Dinosaur Family
(c) Boy Discovers Ancient Mammal 

2. What is true about stegomastodons?
(a) They were a type of lizard.
(b) Hundreds of their fossils were found in New Mexico.
(c) They lived at the same time as mammoths.  

3. What theory is mentioned as a possible reason stegomastodons died out?
(a) They had less food to eat when the mammoths moved in.
(b) Mammoths attacked and killed the stegomastodons.
(c) They had to compete with mammoths for mates.

4. In the final paragraph, terrain can be replaced by _________________.
(a) weather
(b) land
(c) bones

5. Why is New Mexico a good place to look for stegomastodon fossils?
(a) The lakes in the region helped preserve the fossils.
(b) It's dry, but the rain can help expose hidden fossils.
(c) It's the only known place where stegomastodons lived.
