The descriptions of information and messages are correct.

The description of the information and message is correct (D).

A. Information is concrete information

B. Information is a form of information.

C. Information is all the contents spread by human society

D. information exchange produces a meaningful exchange between the sender and the receiver.

Information refers to the objects transmitted and processed through audio, message and communication systems, and generally refers to all the contents spread by human society. People can distinguish different things by obtaining and identifying different information from nature and society, so as to understand and transform the world.

In all communication and control systems, information is a common form of communication. 1948, mathematician Shannon pointed out in his paper entitled "Mathematical Theory of Communication": "Information is used to eliminate random uncertainty". The most basic unit of creating everything in the universe is information.

Gibbs, a famous American physical chemist, founded vector analysis and introduced it into mathematical physics, which found a new angle for studying the uncertainty and contingency of events, thus making mankind take the first step in grasping information scientifically. He believes that "entropy" is a measure of the lack of information in physical systems.

Electronists and computer scientists believe that "information is the content transmitted in electronic circuits with signals as carriers". Professor Zhong Yixin, a famous expert in informatics in China, believes that "information is the way of existence or the state of motion of things, which is directly or indirectly expressed in this way or state".

American information management expert F.W. Horton defines information as: "Information is processed data to meet the needs of users' decision-making. "Simply put, information is processed data, or information is the result of data processing.

According to the research results of information. The scientific concept of information can be summarized as follows: information is the reflection of the movement state and change of various things in the objective world, the representation of the interconnection and interaction between objective things, and the representation of the movement state and change essence of objective things.

Physically speaking, information and matter are two different concepts. Information is not matter. Although the transmission of information requires energy, information itself does not have energy. The most striking feature of information is that it cannot exist independently, and the existence of information must depend on the carrier.