Cormorant and shag are aquatic closely related bird species. They are found together during breeding season and shag feeds on clupeoid fish, sand eel whereas cormorant feeds on flat fish, shrimps and prawns. It indicates

i. Niche of both species is different

ii. Both closely related species have same energy requirement

iii. They stay together because of inter breeding

iv. They are not in direct competition

The correct statements are :