Answer:
The correct answer will be option-Observing and questioning
Step-by-step explanation:
The science can be performed through following the systematic approach to understand and explain the natural phenomenon. The systematic approach is known as the scientific method.
The scientific method begins with making an observation of the natural phenomenon directly with the sensory organs and then asking a scientific question which could have real answers and can be answered through the scientific method.
Thus, the selected option is the correct answer.