Statement-I: Carboxylic acids are acidic in nature

Statement-II: Carboxylate ion is more resonance stabilised than carboxylic acids

Resonance structures of carboxylate ion are equivalent (or) in distinguish. Highly stable resonance structures of carboxylic acids are not equivalent. They have charge separation (in B). Moreover an electronegative atom like  oxygen possesses a positive charge.

$\therefore$ Carboxylate ion is more resonance stabilized than a carboxylic acid

$\therefore \mathrm{RCOOH}\rightleftharpoons \mathrm{R}-{\mathrm{COO}}^{-}+{\mathrm{H}}^{+}$

$\because$Product is more stable, reaction proceeds in forward direction

Thus carboxylic acids are acidic.