Who proposed the five-kingdom classification? On what criteria was it based,and what are its main characteristics or merits?

(N/A) $\rightarrow$ $R.H. Whittaker$ $[1969]$ proposed the five-kingdom classification.
$\rightarrow$ The kingdoms defined by him were named $Monera$,$Protista$,$Fungi$,$Plantae$,and $Animalia$.
$\rightarrow$ The main criteria for classification used by $Whittaker$ were:
$(i)$ Cell structure $(ii)$ Mode of nutrition $(iii)$ Thallus organization $(iv)$ Reproduction $(v)$ Phylogenetic relationships.
Table below gives a comparative account of different characteristics of the five kingdoms:

$A$. Characters	$B$. Monera	$C$. Protista	$D$. Fungi	$E$. Plantae	$F$. Animalia
Cell type	Prokaryotic	Eukaryotic	Eukaryotic	Eukaryotic	Eukaryotic
Cell wall	Non-cellulosic (Polysaccharide $+$ amino acid)	Present in some	Present (without cellulose)	Present (cellulose)	Absent
Nuclear membrane	Absent	Present	Present	Present	Present
Body organization	Cellular	Cellular	Multicellular/loose tissue	Tissue/organ	Tissue/organ/organ system
Mode of nutrition	Autotrophic (chemosynthetic and photosynthetic) and Heterotrophic (saprophytic/parasitic)	Autotrophic (photosynthetic) and Heterotrophic	Heterotrophic (saprophytic/parasitic)	Autotrophic (photosynthetic)	Heterotrophic (holozoic/saprophytic etc.)