Distributed crowdsourcing is where the tasks are broken into discreet parts and completed independently. 

San Jose State University

How crowdsourcing tasks are arranged often varies. They are typically arranged in these three ways.
- Distributed
- Collaborative
- Competitive

Organization of Crowdsourcing for Education

Jiang, Y., Schlagwein, D., & Benatallah, B. (2018). A Review on Crowdsourcing for Education: State of the Art of Literature and Practice. PACIS, 180

Collaborative crowdsourcing is where the tasks cannot be divided into individual pieces and require collective participation. 

Competitive corwdsourcing is where the tasks are completed competitively. This is done to create a highly motivated crowd.