Urgent !
Carbon anodes.
Cryolites.

Cryolite is used as an insecticide and a pesticide.

A carbon anode is a positively charged receptor on a carbon electrode. It attracts electrons, which are charged molecular particulates, and usually works in conjunction with a cathode, a negatively charged receptor.

Explanation:

b. acid is the correct answer @jayxboof all social media

acid : acids are those which accepts an electron-pairs.

base : bases are those which donates ab electron-pairs.

alkali : it is a base that dissolves in water. it is basically a base and the ph greater than 7.

hydroxide ion : it is a poly-atomic ion which is negatively charged.