<span>The relationship between the red knot and the horseshoe crab is that of parasitism. The red knot benefits at the expense of the horseshoe crabs while the horseshoe crab only loses.</span>
Antihistamines are drugs that are used to treat allergic rhinitis (both seasonal and perennial) and other form of allergies that cause hives or urticaria. They can give relief when a patient has nasal congestion, sneezing or hives because of pollen, dust, or animal allergy (allergens). Second generation antihistamines such as loratidine are prescribed for seasonal allergies because they are less sedating than the first generation antihistamines.
Https://www3.epa.gov/climatechange/kids/impacts/effects/ecosystems.html
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A quick Google search revealed that Andrew Johnson was the 17th president of the United States.
