Does communication ease parent/child tension?

As long as it is done correctly and without yelling, of course, Being able to sit down and discuss how everyone feels and what helps and what hurts, as well as what is expected always makes things better and eases tensions. People who know where they stand can make adjustments accordingly. Whereas people who are making assumptions, often misread the situation and make things worse.

I would have to say yes. Good communication is key if any relationship is to flourish.  It is often said that a strong relationship between any two people is one that is made up of 2 good forgivers. This would be the case between parent and child. We get sound advice from the scriptures telling children, honor your father and your mother that it may go well with you and you live a long time on the earth. It goes on to tell fathers  do not be irritating your children but go on bringing them up in the discipline of Jehovah

I suppose it would be dependant upon the type of communication... If the communication is a negative form like argumentative or condescending... Then, it would increase 'tension'... If however, it  is in the form of support, understanding and love... Well, I would imagine it would decrease tension as that is the affect typically rendered by any positive influence.

Don't under estimate even an non verbal communication .. A message can be delivered by a facial expression or even a hand gesture... Body language can speak volumes .. and can administer 'communication' both negative and positive.

Love is not what you say... Love is what you do.

Good communications will soothe all bad feelings between a Parent and child, between two adults or kids.  Its the only way too get a challenge out in the open and talk about and see if there is a civil way to solve the challenge.  Now a good listener is as good as a good communicator but communication is a good basis to build any relationship on