All the correct answers, which techniques can help reduce the effects of tornadoes are building storm cellars and wind-resistant structures and using more radars and satellites in the area.
A tornado is a cyclonic atmospheric phenomenon, of short duration and extension, but great intensity, in which an air mass rotates about an axis at high angular velocity, having its lower end on the earth's surface and the upper end in general contact, with a cumulonimbus cloud.
If you are indoors, avoid being near windows or glass doors. Safer places are the bathroom, basement or hallway. If you live in a building, look for the lowest floor. It is also important to stay under tables or sturdy objects.
See more about tornado at brainly.com/question/1146984
#SPJ4
