Why do monkeys belong to kingdom Animalia?
On the basis of multi-cellular hetero-trophism.
R H Whittaker (1969) divided the organisms into five Kingdoms i.e., Monera, Protista, Fungi, Plantae and Animalia.
Monkeys bear the characters multi cellular body, heterotrophic mode of nutrition, absence of cell wall etc. These are the characteristic features of the Kingdom Animalia. So, monkeys belong to the Kingdom Animalia. Thank you