I believe that the answer would be D, both the speaker and the microphone
option A is a precise one to be selected!
Answer:
Intermolecular forces are weaker attractions that hold molecules or noble gas particles close together when they are in a liquid or solid form.
Explanation:
When volcanoes erupt, they emit a mixture of gases and particles into the air. Some of them, such as ash and sulphur dioxide, have a cooling effect, because they (or the substances they cause) reflect sunlight away from the earth. Others, such as CO2, cause warming by adding to the the greenhouse effect.
