Optimising Image on Mobile

Hi everyone
I have replaced my website slider with a hero banner image - of 1250 x 1000 px. It looks fine in all devices except mobile. How do I optimise it for mobile?

Many thanks
Amanda


Here is my site Read-Only: LINK
(how to share your site Read-Only link)

Add screenshot + live url (No way to guess your issue).

Read this:

Here is the live url
https://preview.webflow.com/preview/ec1-8c9c979857003a5e2ff7b-83c8e57ba63c1?utm_medium=preview_link&utm_source=designer&utm_content=ec1-8c9c979857003a5e2ff7b-83c8e57ba63c1&preview=4d0dcd7a94dd32bca2c418b6208eac9f&mode=preview

Mobile Screenshot is uploaded
There are currently 3 potential options for the homepage image. My issue is that if there is only one, it is not optimised for mobile. Many thanks