1)
What are the implications of the word "Becha"?
1.
Rashi and Targum Yonasan: It implies that the frogs actually entered their stomachs and proceeded to croak inside them.
2)
Why did Hashem send a plague of frogs upon the Egyptians?*
1.
Oznayim la'Torah: The sound of the myriads of frogs' incessant croaking was deafening - a punishment for the cries of the babies whom the Egyptians had killed. 1
1
Oznayim la'Torah: As Hashem said to Kayin, "Kol Demei Achicha Tzo'akim Eilai Min ha'Adamah!" (Bereishis 4:10).
