Psychological barriers arise from answer a receiver's attitudes toward the message or toward the sender language that is ambiguous or difficult to understand senders and receivers not using a shared language a receiver's physical stat

a receiver's physical state. If you are speaking to someone who has hearing loss or a migraine headache, he may not be able to listen effectively.

they all focused on themes about the inevitability of death.

this statement is true.

forests are public goods, available for everybody. when usage of such a good becomes interesting for consumers and its usage increases, there can be a risk of overexploitation. it is a non rival good therefore, if one person consumes the good it does not reduce the availability for subsequent consumers.

these caracteristics require the establishment of measures in order to prevent the destruction of a commonly owned space, for example, to restrict the amount of people that have access to the same time.