instruction:
Based on the information present in the given passage, you need to write a correct answer to the given question. A correct answer is one that correctly and completely answers the question. Do not write answers that address the question partially or incorrectly. The correct answer must be contained in the given paragraph.
question:
Paragraph- Sent 1: Fossils can be used to match up rock layers.
Sent 2: As organisms change over time, they look different.
Sent 3: Older fossils will look different than younger fossils.
Sent 4: Some organisms only survived for a short time before going extinct.
Sent 5: Knowing what organisms looked like at certain times also helps date rock layers.
Sent 6: Some fossils are better than others for this use.
Sent 7: The fossils that are very distinct at certain times of Earths history are called index fossils.
Sent 8: Index fossils are commonly used to match rock layers.
Sent 9: You can see how this works in Figure 2.30.
Sent 10: If two rock layers have the same index fossils, then they're probably about the same age.
Question: How can extinction help to date rock layers?.
answer:
Some animals only existed during certain time periods before becoming extinct. It helps to date that layer of rock where these animal fossils are present.

question:
Paragraph- Sent 1: A handful of Bronze Age relics has fostered an assumption that prehistoric settlers inhabited Ibiza thousands of years ago.
Sent 2: Greater evidence of such a people is found on Mallorca and Menorca than on Ibiza, but one of the Balearics' most important sites is actually on the island of Formentera, where the megalithic monument/tomb of Ca Na Costa has been dated to 2000 b.c.
Sent 3: Ibiza's key location between Africa and ancient Iberia made it a convenient stopover for Mediterranean seafarers, such as the Phoenician traders, who called the island Ibosim.
Sent 4: The Greeks dubbed it Ebysos, the Romans called it Ebusus, and the Moors, Yebisah.
Sent 5: The Carthaginians: A detailed history of the island doesn't begin until it became a colony of Carthage in the 7th century b.c.
Sent 6: .
Sent 7: The Carthaginians originally came from the area comprising present-day Lebanon, and from their bases in North Africa and what's now Spain, they challenged the Roman Empire for domination of the Mediterranean region.
Sent 8: Their interest in Ibiza lay partly in its vast salt flats, which to this day remain the source of a profitable industry.
Sent 9: They capitalized on the natural resources by using the salt to cure fish, which they exported to their home country.
Sent 10: The Carthaginians also carried out lead mining and continued to be of significance up until this century.
Sent 11: It is believed that the lead pellets which were used by the Carthaginian general Hannibal were made on Ibiza.
Sent 12: The Carthaginians also considered the island a holy place, and here in great splendour they buried thousands of their citizens in a huge necropolis on the Puig des Molins (Hill of the Windmills) below the Dalt Vila (Old Town) of Ibiza.
Sent 13: Under the gnarled olive trees archaeologists have uncovered a treasure trove of statues, jewellery, pitchers, tools, and coins, which are now displayed in the town's two archaeological museums.
Sent 14: The Romans never really infiltrated Ibiza, and even after the defeat of Hannibal in 202 b.c.
Sent 15: during the Second Punic War their influence was restrained.
Sent 16: Only with the fall of Carthage in 146 b.c.
Sent 17: did they manage to make inroads, but, as local historians stress, Ibiza was neither conquered nor annexed by Rome, but confederated, retaining remarkable autonomy.
Sent 18: For centuries to come the old Carthaginian traditions were allowed to continue on Ibiza alongside the new Roman way of life.
Question: What human developmental Age is evidenced at the monument Ca Na Costa?.
answer:
The Bronze Age.

question:
Paragraph- Sent 1: Joe's parents are farmers and they have a huge farm with cows, chickens, and ducks.
Sent 2: Joe loves the farm and all the things he gets to play around and play on.
Sent 3: One day, Joe's father told him not to get near a tractor that was sitting in the field.
Sent 4: His father was worried that Joe would climb on it and hurt himself.
Sent 5: Joe went out to the field and was feeding the horses and cows.
Sent 6: When he was done, he saw the tractor his father told him not to get near.
Sent 7: He knew that climbing on the tractor wouldn't hurt anything, so he did.
Sent 8: He climbed on to the seat and sat there.
Sent 9: Then, he pretended he was his father and pretended that he was driving the tractor.
Sent 10: Joe's father saw him playing on the tractor and called for him.
Sent 11: Joe heard his father calling for him and got off the tractor really fast.
Sent 12: When he did that, he fell off and hurt his arm.
Sent 13: Joe was in pain and his father came running to check on him and picked him up and sat him on a bench and asked him why he did that.
Sent 14: Joe looked at his father and said, "I wanted to be like you."Sent 15: Joe's father gave him a hug and asked him if he wanted to ride with him on the tractor.
Sent 16: Joe did and after he got a bandage on his arm, he and his father rode in the field on the tractor.
Question: What had he just finished doing when he saw the tractor.
answer:
Feeding the horses and cows.