Smallpox (Orthopoxvirus variola) is the first human disease considered to be globally eradicated. All of the following factors played a huge role in its eradication EXCEPT for . a. the existence of an inexpensive, effective vaccine
b. the removal of animal reservoirs in nature
c. rapid diagnosis due to obvious signs and symptoms
d. the fact that there are no asymptomatic carriers, so the disease is always diagnosable

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.

No because the eaeht is on a 23.5 degree axis tilt and so when it is winter the northern hemisphere is pointing away from the sun and the soutubern hemisphere is pointing toward the sun

Ithink sanforcisco california (i am not 100% sure) if you feel the opposite so that lol

The answer is c establishing proper sleep hygiene