Final answer:
Alexa's method of leading a project by assigning tasks and requiring all decisions to pass through her showcases an autocratic leadership style (a).
Step-by-step explanation:
Alexa, who was recently put in charge of a multi-million-dollar project and assigns tasks with all decisions being routed through her, is exhibiting an autocratic leadership style. Autocratic leaders, like Alexa, issue orders and assign tasks while maintaining a clear focus on meeting goals. Alexa's approach, which involves centralized decision-making and strong control over team members, typifies this style of leadership.
The leadership style that Alexa is exhibiting in this scenario is the autocratic style. Autocratic leaders make decisions without consulting others and give orders and assignments to their subordinates. They have a strong focus on meeting goals and may not involve others in the decision-making process.