What causes air to enter into a tornado? A. The air pressure is lower outside the tornado than inside
B. The air pressure is higher inside the tornado than outside
C. The air pressure is lower inside the tornado than outside
D. The air pressure is the same inside and outside the tornado

The air pressure is lower inside the tornado than outside

Explanation:

Tornadoes form in unusually violent thunderstorms when there is sufficient (1) instability and (2) wind shear present in the lower atmosphere. ... For instance, dry air in the middle atmosphere can be rapidly cooled by rain in the thunderstorm, strengthening the downdrafts that asist in tornado formation

easy

explanation:

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.