Final answer:
Ancylostoma duodenale and Necator americanus are the hookworms that cause iron deficiency anemia in humans by infecting the intestines after larvae penetration through the skin.
Step-by-step explanation:
The hookworms associated with iron deficiency anemia are Ancylostoma duodenale and Necator americanus. These parasites infect humans through soil contaminated with dog or cat feces. Larvae penetrate the skin, travel to the lungs, and are eventually swallowed to mature in the intestines, leading to symptoms like abdominal pain, diarrhea, loss of appetite, weight loss, fatigue, and anemia.