Question

The beating of the heart is an example of

• A. Slow change
• B. Undesirable change
• C. Man-made change
• D. Fast change

Answer 1

The correct option is D

Fast change

The explanation for the correct option:

Option D

• The changes that take short time to occur are called fast change.
• Our heartbeat is at least 72 times in one minute.
• So, the heartbeat is a fast change.

Therefore. option D is correct.

The explanation for the incorrect option:

Option A

• The changes that take a long time to occur are called slow change.
• For example growth of trees, the formation of coal under the earth, etc.

Therefore, option A is incorrect.

Option B

• The changes that are harmful to us and we do not want to take place are called undesirable changes.
• For example flooding of rivers, the occurrence of landslides, etc.

Therefore, option B is incorrect.

Option C

• Man-made changes made by human beings
• For example cooking food, weaving clothes, etc.

Therefore, option C is incorrect.