Resource Plan _ in marketing, there is only one thing that's scarce: RESOURCES. Some people have a lot of money but lacked ideas and another group is the other extreme; more ideas and less money. Many of us probably the later than the former! In the marketing plan we will tackle things like people to hire, pricing, distribution plan, sales programs budget and so on.
Risk _ in our marketing plan we shouldn't only concern about making money or positive points, we also should address the risk we are taking. for example it is common for a marketing plan to capture things like, "require additional staff to handle sales call", "additional investment from the management budget will increase chances of increasing 10% sales target" and many more. Imagine if you can factor your risk earlier and think through it, wouldn't it be better for you?