Dear customer,
Thank You for using Ample-construction WordPress Theme, This is a problem due to the title of service section is long, For solving this use CSS
.service-item .col-md-4 {
width: 32.333333%;
}

add this CSS on additional CSS. go to appearance > customize > additional CSS and published it.
if still issues on your sites, please contact us in our live chat, we are really happy to help you.