auswählen
to select
To decide on one or more people or things from a larger group; to make a choice.
Sie dürfen drei Bücher aus dieser Liste auswählen.
You may select three books from this list.

to select
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to select
To decide on one or more people or things from a larger group; to make a choice.
Sie dürfen drei Bücher aus dieser Liste auswählen.
You may select three books from this list.

'Auswählen' (to select) is a separable verb. The prefix 'aus-' goes at the end in a main clause. In subordinate clauses and in the infinitive with 'zu,' the verb stays together.
Welches Kleid wählst du für die Party aus?
Which dress are you selecting for the party?
When you name the group from which you choose something, you use the preposition 'aus' followed by the dative.
Der Gewinner wird aus allen Teilnehmern ausgewählt.
The winner is selected from all participants.
Common things that people 'auswählen' (select) are products, candidates, options, or offers.
Die Firma muss einen neuen Mitarbeiter aus den Bewerbern auswählen.
The company has to select a new employee from the applicants.
to take
'nehmen' and 'auswählen' can both mean that you choose something from several options. 'nehmen' often sounds everyday and direct, especially when shopping, eating, or quickly choosing an option. 'auswählen' emphasizes the process of choosing more strongly: you look at several options and make a conscious decision. That is why you can say 'Ich nehme die Suppe' (I'll have the soup) in a restaurant. When a teacher chooses one text from many for the course, 'auswählen' fits better. The words can be confused because both can be used for decisions from a selection.

Der Arzt wählt für die Behandlung ein passendes Medikament aus.
The doctor selects a suitable medication for the treatment.
In der Bäckerei nehme ich das Brot mit den Körnern.
At the bakery, I'll take the bread with the seeds.