**Core Concept:** Chikungunya is a viral disease caused by the Chikungunya virus, an alphavirus belonging to the Togaviridae family. It is transmitted to humans through the bite of infected Aedes mosquitoes, primarily Aedes aegypti and Aedes albopictus.

**Why the Correct Answer is Right:** Chikungunha is primarily transmitted by the bite of infected Aedes mosquitoes. Aedes aegypti and Aedes albopictus are the two primary species involved in this transmission. Aedes aegypti is a daytime feeder, while Aedes albopictus is an evening feeder, but both species are capable of transmitting the virus to humans.

**Why Each Wrong Option is Incorrect:**
A. Aedes aegypti is not the only mosquito species capable of transmitting Chikungunya. Although it is the primary vector in many regions, other species like Aedes albopictus can also transmit the virus.
B. Aedes mosquitoes are daytime feeders, not mosquitoes that feed at night. However, Chikungunha transmission can occur during daytime or nighttime, depending on the species and their feeding habits.
C. The question is not asking about the cause of Chikungunha but the mosquito species involved in transmission.
D. The question does not ask about the severity or impact of Chikungunha but rather the mosquito species involved.

**Clinical Pearl:** Understanding mosquito species involved in Chikungunha transmission is crucial for public health initiatives and disease control measures. Aedes mosquitoes are commonly found in tropical and subtropical regions and are vectors for many other diseases, such as dengue and Zika.

**Correct Answer:** C. Chikungunha is primarily transmitted by Aedes mosquitoes, particularly Aedes aegypti and Aedes albopictus. These mosquitoes are daytime feeders and can transmit the virus during daytime or nighttime feeding.