9) which of the following would be most useful for determining the presence of a tornado?
a. barometer
b. doppler radar
c. weather satellite
d. weather balloon

Doppler radar is useful for determining if there is a tornado present

Explanation:

Option (B)

Explanation:

A Doppler radar is a high-technological, special type of radar that involves the principle of Doppler effect in order to determine the data regarding the velocity of any particular object that is located at a certain distance.

This type of radar helps in detecting the enormous circulating updrafts that typically takes place within a supercell, that have a diameter between 2 to 6 miles and are comparatively much bigger and larger, in comparison to a tornado.

So they are most useful in determining tornadoes.

Thus, the correct answer is option (B).