You want to create a hyperlink to a secure resource that ensures information is properly encrypted. you also want this link's code to validate as html5. which line of html code will accomplish this?

Well, it kinda depends on the type of resource.
Lets say we are trying to access files or something. We could use the following link
<a href="ftps://SomeDotComSite"> Link to Resource</a>

If we are trying to access a page that gives us our resource we could use the following

<a href="https://SomeDotComSitePage"> Link to Page</a>

The steeply sloping region of a continental margin where the sea floor descends at a rate of greater than 1 ft for every 40 feet is called. continental slope.