Picture community participation as a staircase. At the bottom people simply go along with what experts decide; at the top people are in charge of decisions themselves. The correct answer is the choice that puts the most control in the hands of the community.
Compare the options on that scale. Cooperating with workers is bare minimum involvement, since the community is only assisting. Donating resources is a step up but still a supporting role. Designing an intervention around assessed needs is better because the community is considered, yet outsiders usually run the assessment and the planning.
The strongest form is when the community does the planning of the intervention itself. Here the people set the agenda and direct the work, which is true empowerment and the peak of the participation ladder.
\[\boxed{\text{Planning of intervention by the community}}\]