Question

Easy question!

Fan & Medal!

Answer 1

Urea is likely to be the primary nitrogenous waste in living conditions that include

coastal areas that support seagulls and other marine birds
fresh water flowing across the gills of a freshwater salmon
salt water, such as the oceans that support dolphins and seals
terrestrial environments, such as the forests that support black bears

Answer 2

@RANE @One098 @Objection @marylou004

Answer 3

I think its the third option..

Answer 4

Urea is the waste product for terrestial animals like us, Human Beings...So, the 4th option is correct.

Answer 5

Aquatic animals excrete ammonia and birds excrete uric acid.