Pigeons adjust to farm life. They adjust to city streets. In city streets they peck their livelihoods from garage heaps. (compound-complex sentence)

Pigeons adjust to farm life. They adjust to city streets. In city streets they peck their livelihoods from garage heaps. (compound-complex sentence)

Pigeons adjust to farm life and they adjust to city streets where they peck their livelihoods from garage heaps.