Accessing WordPress data via JSON gives HTML data for certain keys

I am creating an Android app for a client whose site is in WordPress. I want to access the posts, but I don’t know which API to hit. One of the APIs I found after some searching is https://www.<mysite>.com/wp-json/wp/v2/posts. This gives a ton of key value pairs, So I was tying to access this site via this URL. But for a particular content key, this is giving the following output: