Final answer:
M&M's business is affected by international competition due to globalization, which has removed market boundaries and increased the rivalry from companies worldwide.
Step-by-step explanation:
The element of the marketing environment that has affected the business of M&M, a company producing musical instruments, in the scenario described is international competition. With globalization erasing the previous boundaries of local and national markets, companies now compete on a global scale. This shift means that firms like M&M can no longer rely solely on their domestic market position, as they can face competition from international entrants offering comparable or better quality products at competitive prices. Such a change necessitates a reevaluation of M&M's marketing strategies to maintain their market position against these new global competitors.