Resource and process management approaches include task assignment, load balancing, and load sharing. Task assignment involves assigning tasks to suitable nodes. Load balancing distributes processes to balance load across nodes. Load sharing equitably distributes processes so no node remains idle. Good scheduling considers factors like dynamic decision-making, balanced performance/overhead, fairness, and scalability. Process migration moves processes between nodes for load balancing. Issues include freezing processes during transfer, address space transfer mechanisms, and maintaining communication between related processes. Threads allow finer-grained parallelism and resource sharing within a process. They present challenges for synchronization, scheduling, and signal handling.