Natural selection is the change of a species traits and characteristics over time to adapt to its environment. Over a period of time, the species will change and evolve because of its changing traits to adapt.
Answer: Irish and Roman Catholic immigrants
Explanation:
The correct answer is acculturation. Acculturation is being defined as a process that involves physiological, social, or even cultural change by which they are likely to be rooted from the blending among cultures and it could be evident in multiple levels.
Prime numbers are numbers that are only divisible by 1 and themselves. So, to tell if a number is prime, look at its factors.
19:
1 x 19
29:
1 x 29
39:
1 x 39
3 x 13
So, because 39 has more than one set of factors, it's NOT a prime number.