Which of the following is an arrhenius base? a brønsted-lowry base? a lewis base? it is possible for a base to be of more than one type.

Arrhenius acids are substances which produces hydrogen ions in solution, Arrhenius bases are substances which produces hydroxide ions in solution. A Bronsted-Lowry acid is a proton donor (usually hydrogen ion). And a Bronsted-Lowry base is a proton acceptor (usually hydrogen ion). Consider a chemical reaction between HCl and NaOH. We have the reaction HCl + NaOH à NaCl + H2O. The hydroxide ions in the NaOH are bases because they accept hydrogen ions from acids to form water. And an acid produces hydrogen ions in solution by giving a proton to the water molecule. Therefore, the answer is d. a Bronsted-Lowry base.

i'm assuming that the correct answer is indeed the first one/ "a"..

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.