Which of the following causes tornadoesa. wind shearb. stationary frontsc. dry climatesd. condensation

The correct answer is option A, Wind Shear

Explanation:

The tornadoes are formed from the fast rotating air which develops into a funnel shape. This is the reason why tornadoes usually occur during the thunderstorm in a cumulonimbus cloud when the wind direction and speed changes at high altitude thereby producing horizontal air swirl.  Swirling air takes the shape of funnel and finally touches the base of the ground to become a tornado.

it enhances antibody production by t cells of the adaptive immune system.

hope i'm right

explanation:

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a