Give five elements of the following sets. A = {different land forms}
B = {x/x is a prime number greater than 20 but less than 50}
C = {even number less than 20}
D = {fraction less than 1}
E = {noun that starts with letter "a"}

Find the answer below.

Step-by-step explanation:

1. A = {mountain, valley, plateau, plains and hills}

A landform refers to a geomorphic or natural feature of the Earth's surface, which typically makes its terrain.

2. B = {23, 29, 31, 37 and 41}

A prime number can be defined as any number that is greater than one (1) and can only be divided by itself or one (1). In this case, they are greater than 20 but less than 50.

3. C = {2, 4, 8, 10 and 12}

An even number can be defined as any number that can be divided by two (2) without any remainder. In this instance, they should be between one (1) and twenty (20).

4. D = {2/3, 1/2, 3/4, and 1/5}

A fraction that is less than one (1) refers to a proper fraction. Therefore, proper fractions must have the value of their numerator to be less than the value of their denominator.

5. E = {ant, angel, angle, anaconda, and ark}

A noun can be defined as the name of any place, people, animal or things. In this context, the nouns should all start with the letter "a."