Answer:
The commonality between the two waves is that they; “Carry energy” and “Follow a pattern”.
A wave is defined as a disturbance along a medium that transfers energy. Mechanical waves require a material medium for propagation while electromagnetic waves do not require a material medium fro propagation.
At the center of the Venn diagram, there ought to be something that is common to both of the types of waves and that is the fact that they both “Carry energy” and “Follow a pattern”.
Hence, what is common is that all the waves carry energy.
Step-by-step explanation: