Different in DFD and ER-RELATION

WHAT is difference between DFD and ER-RELATION and the 0 LEVEL ,1 LEVEL and 3 LEVEL diagram

ER diagram is Entity Relationship Diagram which shows relationship between different entities in a process....and Data Flow diagram is a figurative arrangement which shows the flow of data how it is sed in diff stages in a particular process.

There is no such limitation like cardinality, participation in DFD compare to ERD.

While in solving assignment, you need to focus about entity identification, attributes findings from those entities and tries to establish relationship among those entities keeping in view the requirements and understanding of the real world domain knowledge as you are familiar with the sentences.