What do scientists need to look at before developing an argument?
The validity of data, claims, hypothèses, and observations.
Their opinion and personal views.
The arguments of famous people on the topic.
The arguments that make the most sense for society.

validity of the data, claims, hypothèses, and observations.

Explanation: Everything can be wrong if the initial data is wrong, so they have to double check. And all the other options are kinda pointless.

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".