"You give them many things."
Translation:Tú les das muchas cosas.
Yes, you are correct!! That is clarification and it makes it clear who exactly you are giving to as the pronoun 'les' is ambiguous.
I agree with with ChristinaSuko. The addition of "a ellos" on the end clarifies that "les"= to them, and not to you all (ustedes).
24 August 2018 - "Tú les das a ellos muchas cosas" was not accepted. Does "a ellos" have to go to the end of the sentence?
My response was "A ellos les das muchas cosas" and that was marked wrong too. Can someone please clarify whether "a ellos" has to be at the end of the sentence (and if so, why?) or if other placements of those words are just as valid and Duolingo just hasn't entered them into their database?
Likely the latter. Duolingo can't predict all the various ways that some sentences can be translated.
"Les das muchas cosas" rejected 20190831. Reported. The "Tu" is redundant (rebundancia).
Regalar is more like "gifting". The verb dar is more common for just giving something to someone.