Which are the most important tasks for project planning?

I would say the correct answer is assigning resources to tasks, creating a timeline, and making a budget.

When you are planning a project, obviously the most important thing is to create a timeline of how you want that project to go. In order to do this, you also need to have a certain budget so as to pay for everything you want to do within your project.

after the roman empire, the catholic church began to unify by taking on many duties of a government.

incident infrared radiation is blocked. visible and ultraviolet radiation heat   earth.

earth radiates infrared radiation. infrared radiation is blocked and heats earth. visible and shortwave radiation heat earth.

earth radiates longwave radiation

longwave radiation is reflected downward longwave radiation heats earth