Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bc4/3...Bc5/4. c3/4...Nf6/5. d4/5...exd4

= Center Attack =

5...exd4
Black takes the d4 pawn with the e5 pawn. White will respond by either pushing the e4 pawn forward to e5 attacking the Black knight, or recapture the pawn with 6. cxd4

Theory table
'''1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4'''