Answer:
The passage describes the invitation extended to Catherine Morland by Mr. Allen and his wife to join them on a trip to Bath. The invitation comes at a time when Mr. Allen, who owned much of the property around Fullerton, is ordered to Bath for the treatment of his gout. While Mr. Allen's wife is fond of Catherine, it is likely that she is also aware of the limited opportunities available to a young lady in a village like Fullerton, and is therefore keen to offer Catherine the chance to explore the wider world.
The passage presents the invitation as a happy event, with Mr. and Mrs. Morland quickly agreeing to let Catherine join the Allens on their trip. Catherine, for her part, is described as being "all happiness" at the prospect of leaving Fullerton and venturing out into the world.
The passage is significant in that it sets the scene for Catherine's journey of self-discovery and adventure. As a young woman in a small village, Catherine's prospects for excitement and adventure are limited. However, the invitation from the Allens to join them in Bath presents her with an opportunity to experience life beyond the confines of Fullerton. This journey will take her on many adventures, where she will encounter new people, navigate difficult social situations, and discover more about herself and the world around her.
Overall, the passage is a key moment in Jane Austen's novel Northanger Abbey, as it sets the stage for Catherine's journey of self-discovery and adventure. The invitation from the Allens is a turning point for Catherine, as it offers her the chance to break free from the limitations of her village and explore the wider world. The passage is significant in that it foreshadows the many adventures that Catherine will have, and the lessons she will learn along the way.