Two questions about acid? ?

1. which of the following statements is not true regarding acids?

arrhenius acid is any substance that increases the concentration of hydronium ions.

lewis acid is a substance that donates a lone-pair of electrons.

brønsted-lowry acid is any substance that donates a hydrogen ion.

the ph is less than 7.0.

2. which of the following would decrease the ph level of an acidic solution?

increasing the number of hydrogen ions
increasing the concentration of hydroxide ions
adding a base to the acid
decrease the concentration of hydroniu