Q. Which of the following is an example of parasitism?

Explanation by: Admin

All of the examples listed involve parasitism, which is a type of symbiotic relationship where one organism benefits at the expense of the other.
(A) Leeches consume blood of their host: Leeches are parasitic because they feed on the blood of their host, such as mammals, without providing any benefit to the host.
(B) Ticks that live on dogs: Ticks are also parasitic, as they attach to dogs (or other animals) and feed on their blood, often causing harm.
(C) Aphid insects eat the sap of the host plant: Aphids feed on the sap of plants, which can weaken the plant and may even lead to diseases, making this a parasitic relationship as well.
In all these cases, the parasite benefits by taking resources from the host, while the host is harmed, making these examples of parasitism.