Can you pelase read the sentence ans check the tense of the underlined verb?

The most important element of communication process is often active listening and correct interpretation of what is being said, posing questions and observing non-verbal signals which help us detect the real emotional and psychological state of the persons we are talking to.

If you see some mistake or have some comment, please let me know.

Thank you
Fine. More formal is to whom we are talking.

the communication process
'THE communication process'

'the person' not 'the persons'

and the tense used seems fine to me, although simple present could work I believe...
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Thank you Mr Micawber and Waiti
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Waïti'the person' not 'the persons'
I think it is a matter interpretation. Persons - more than one, nothing wrong.www.leg.state.nv.us/NRS/NRS-484B.html

NRS 484B.257 Vehicle entering intersection marked stop or yield. ... NRS 484B.467 Parking space designated for persons who are handicapped: Signs; ...