Which insect is known to transmit diseases like Lyme disease and West Nile virus?

Ticks are known vectors for diseases such as Lyme disease and other serious health issues. They feed on the blood of mammals, birds, reptiles, and amphibians, and in doing so, they can transmit pathogens that cause these diseases to their hosts. Lyme disease is primarily transmitted through the bite of infected black-legged ticks, commonly referred to as deer ticks.

While mosquitoes are also significant vectors, particularly for diseases such as West Nile virus, they are not involved in transmitting Lyme disease, which makes ticks the correct answer for both diseases mentioned in the question. Understanding the roles different insects play in disease transmission is crucial for effective pest control and public health awareness.