Which group of sentences best uses a variety of sentence patterns to convey meaning in relationship between ideas

The cat curled itself up, so it was a ball. Its human scratched its ears, so it purred. The cat curled itself into a ball. It began to purr when his human scratched his chin. The cat crawled itself into a ball. It purred. Its human scratched its chin. The cat curled itself into a ball. It’s human scratch its chin. When it felt the scratching, it began to purr.