What Are Disappearing Messages on WhatsApp and How to Enable It WhatsApp has a privacy-focused and space-saving function called Disappearing Messages. When enabled, WhatsApp will automatically delete chat messages after 24 hours, 7 days, or 90 days. Using WhatsApp's disappearing messages feature is similar to giving your texts an expiration date....

The principle of individual ministerial responsibility refers to the convention that a minister is responsible to every actions of their department / ministry and it's applicable in the presidential system of government. Collective responsibility is to cabinet or parliamentary system of government where ministers are collectively responsible for there decisions.