I believe 1 is growth and 2 is reproduction. Hope this helps.
Lithium is a good reducing agent because it is electropositive [it rapidly gains electrons]
fluorine is good oxidizing agent electronegative [it loses electrons fastly]
A. water
the word hydro means water
I choose the option A.
The electron absorbs energy from specific wavelength then moving from a lower energy orbital to a higher energy orbital.
The chemicals are reactive with one another
