If 97% of the earth water is in the oceans why are there water scarcity problems

I don't know, maybe because it is salt water, and to purify all of that water, would be challenging.

a

explanation:

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.