"1000 x faster"

Based on the website ("1000 x faster"), choose the best answer to each of the following questions.

True or false: Species only become extinct because of humans.
1. True.
2. False.
How quickly are mammals dying out?
1. 40 times faster than natural.
2. 1000 times faster than natural.
3. 100 times faster than natural.
4. 500 times faster than natural.
How quickly are birds dying out?
1. 40 times faster than natural.
2. 1000 times faster than natural.
3. 100 times faster than natural.
4. 500 times faster than natural.
How quickly will species die out in 100 years?
1. 10 times faster than natural.
2. 10,000 times faster than natural.
3. 100 times faster than natural.
4. 1000 times faster than natural.