What does "dove" mean?

[Davie]

English Language Tests, Intermediate level

ESL/EFL Test #257 "Irregular Verbs Test (5)", question 10

David's mother nervously watched as her young son ......... into the swimming pool for the first time.

(a) dive
(b) dove
(c) diving

English Language Tests, Intermediate level

ESL/EFL Test #257 "Irregular Verbs Test (5)", answer 10

David's mother nervously watched as her young son dove into the swimming pool for the first time.

Correct answer: (b) dove

Your answer was: ?
_________________________

why is dove?

Davie

[Diverhank]

Dove (past tense) is used to match the past tense "watched".