Metal are what because light reflects off the electrons

a. shiny
b. conductive
c. malleable
d. ductile

The right choice is (A) Shiny

Metals are shiny because of the free electrons that are present in them.When light hits the surface of metals then electrons go to excitement state and try to escape from the surface of the metal because these electrons are only loosely attached to the metal atoms. As a result giving a photon of light in the form of energy The light emitted from photon is looked by us as shine or brittle.

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min