What is the similarities between a house fly and spider?

Both house flies and Spiders are invertebrates, meaning they lack a backbone, and they belong to the larger group of arthropods. They play significant roles in their ecosystems; house flies are important for decomposition and as pollinators, while spiders help control insect populations. Additionally, both have adapted to thrive in human environments, often found in homes and urban areas. Despite their differences in anatomy and behavior, they share a common evolutionary lineage within the arthropod phylum.