Terrestrial animals must
(1) Excrete large amounts of urine
(2) Conserve water
(3) Actively pump out salts through skin
(4) Excrete large amount of salts in urine.
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Heya folk
Terrestrial animals generally face water problems so unlike the aquatic organisms they conserve water while excretion their waste as either urea or uric acid.
Option 2 is correct.
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