1)
Why does it say "ve'Ha'al es ha'Tzefarde'im", which appears in only one place in Tanach, about Misas Aharon ("v'Ha'al Osam"
1.
Moshav Zekenim: To hint at their Mesiras Nefesh. 1
1
In that they entered hot ovens. Refer to 7:28:151:1. In spite of the fact that frogs are water creatures