Which three environmental factors influence disease transmission?

The correct choice focuses on three key environmental factors that are crucial in understanding how diseases can be transmitted. Climate plays a vital role because it affects the lifecycle and habitat of disease vectors, such as mosquitoes and ticks, directly influencing the incidence of vector-borne diseases. Sanitation conditions are also essential, as poor sanitation can lead to the spread of infectious diseases due to contaminated water sources and insufficient waste management. Moreover, hygiene conditions directly impact the transmission of infectious agents; adequate hygiene practices, such as handwashing and proper food handling, can significantly reduce the likelihood of disease spread. Together, these factors create an environment that can either facilitate or hinder the transmission of diseases.