Answer:
Option D
Step-by-step explanation:
Options for the question are -
a.
Predicting
c.
Inferring
b.
Observing
d.
Scientists use all of the above skills
Solution -
Any scientific research or experiment comprises of following five major steps and all these steps include the skills mentioned in the options. These steps are –
a) Observation – A researcher observes his/her surrounding and the activities going around him/her.
b) Questioning – He/she then has doubts on several parameters such as how something is happening, what are the scientific rules governing it etc.
c) Proposing a hypothesis – Based on the question, a researcher proposes or predicts a cause of the event and hence develops a hypothesis.
d) Testing the hypothesis – A researcher test whether his/her predictions are up to the mark or not
e) Based on the test result, he/she infer the possible cause of event or any happening in his/her surrounding.
Hence, option D is correct