Concept: The cabinet system is defined by the executive’s joint responsibility to the legislature.
Explanation: In a cabinet system, ministers act as a team and are collectively accountable to Parliament.
If one minister loses confidence, the entire cabinet must resign.
The cabinet also formulates major policies and legislative programmes together.
This is why collective responsibility is its most notable feature.
The other options — separation of powers, human rights violation, and impeachment — are not defining features of the cabinet system.
Answer: A. collective responsibility