Why my car take 3 second start engine?

Remembering when it brand new i buy put my key on start less a second engine is on, now 4 yrs old i put my key on start sound

tuk tuk tuk take step 1.5 sec or 2 sec engine start

so… What happening

is it starter bad
is it battery low
is it alternator bad

i just replace 4 spark plug last week, and my battery is good condition when dealer check,

honda crv 14 ,

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