What are the two types of spiders in America that are considered dangerous to humans?

The correct choice identifies the Black Widow and Brown Recluse spiders as the two types of spiders in America considered dangerous to humans.

The Black Widow spider is notorious for its venom, which contains neurotoxins that can cause severe muscle pain, cramping, and other significant symptoms in humans. Bites are rare but can lead to serious health complications, especially in children and the elderly. The distinctive glossy black body and red hourglass marking on the abdomen serve as identifiers for this spider.

Similarly, the Brown Recluse spider is known for its potentially harmful bite, which can result in necrotic lesions and severe pain. This spider is typically characterized by a violin-shaped mark on its back and is usually found in undisturbed areas. Its venom can cause significant tissue damage, making awareness and identification crucial for safety.

The other options include spiders that, while they may possess venom, are not deemed dangerous or pose minimal risk to humans. Wolf spiders and tarantulas, for instance, can bite but typically do not lead to severe reactions, while common house spiders and yellow sac spiders are generally harmless. The hobo spider and crab spider, although they may be concerning, do not carry the same level of risk associated with bites as the black widow and