Hi,
Try this upload the image in LMS and note down the path,
<p><img src="file resource path" width="178" height="163" /></p>
From External source
<p><img alt="Image" src="https://www.google.com/logos/doodles/2018/prasanta-chandra-mahalanobis-125th-birthday-5449803382128640-l.png" /></p>