What action would most likely demonstrate opposition to an employer's decisions?

Engaging in industrial action clearly demonstrates opposition to an employer's decisions because it involves employees taking a stand against management's policies or practices. This form of collective protest is typically used to express dissatisfaction with issues such as pay, working conditions, or other employment terms. Industrial action can take various forms, including strikes or work stoppages, and serves as a direct response to decisions made by employers that employees find unacceptable.

In contrast, participation in team brainstorming sessions, organizing community outreach programs, and implementing training workshops are all activities designed to improve the workplace environment or community relations. These actions tend to promote collaboration and engagement rather than opposition, highlighting a cooperative approach to business operations rather than a confrontational stance.