Add spaces: Itisthelogicalexplanation-butitisnotpossibletoproveitbyhistorytoday.

Answer: It is the logical explanation - but it is not possible to prove it by history today.

Add spaces: Forchildreneatingfishthelevelwillbeevenhigher.

Answer: For children eating fish the level will be even higher.

Add spaces: Powdercollectedinaspecialvessel,spillingintotheriveroranybodyofwater,three-dimensionalwoodenmandalaburningontheriverbank.

Answer:
Powder collected in a special vessel, spilling into the river or any body of water, three-dimensional wooden mandala burning on the riverbank.