When developing a grant proposal, it's helpful to have a clear idea of your research goals, to understand what types of funding opportunities might exist and whether you are eligible to apply for the funding.
These resources are given to organizations for stated purposes or activities to be carried out without substantial sponsor involvement.
These agreements establish relationships between organizations and the sponsors, in which both parties pursue stated goals or activities. You can expect substantial sponsor involvement with these agreements.
Contracts can be considered a form of negotiated procurement. They ususally correlate with a sponsoring agency's specific goals as outlined in a formal announcement.