Number 3 but technically scientists use rocks to see the age of fossils. hoped this helped!!!:-)
<span>Out of 50 million youth in the United States, the percentage between the ages of 6 and 17 who play at least one organized sport per year is 54%
Obesity among children ages 6 to 11 in the United States has increased since the 1960s from 5% to 16%
Obesity among children ages 6 to 11 in the United States has increased since the 1960s from 5% to nearly 6 hours
Since 1990, participation in traditional team sports of football, basketball, and baseball has dropped 30% while extreme sports have grown at a rate of 600%</span>
The answer to this question is <span>operant conditioning
</span><span>operant conditioning refers to behavioral modification technique that impose negative or positive impact toward a certain behavior.
In this type of conditioning, subject will given some sort of reward if the subject do a desired behavior and will given some sort of punishment if the subject did otherwise</span>
