Answer: A. Does the wave require a medium to travel.
Explanation:
Mechanical waves require the presence of a material object to be able to engage in energy transfer. For example, Sound is a mechanical wave that needs a medium to travel such as a solid or liquid.
Electromagnetic waves on the other hand, are able to travel through a Vacuum including that of space and they include all light waves. This is why the sun's light is capable of reaching Earth.
B.False. Animals usually reproduce sexually, most are not made to reproduce asexually. Plants reproduce asexually.
A lipid<span> is a </span>fat<span>-like </span>molecule<span> and is a major building block of the cells of animals. </span>Lipids<span> are organic, </span>meaning<span> that they contain carbon atoms. </span>Lipids<span> do not dissolve in water.</span>
