# data[].attributes.headline
be (present simple) + main verb (past particple) + by

# data[].attributes.subject
be (present simple) + main verb (past particple) + by

# data[].attributes.body
The sand castle is made by the children.

# data[].attributes.body
"The people who live here have had the same kind of lifestyle for hundreds of years. The amazing thing about these islands is that they are man-made and made out of plants."

# data[].attributes.body
My favorite text to listen to was the one where Sophie was talking about floating islands. I didn't know they existed, so I learned where they are and how they are made so they don't sink in.

# data[].attributes.body
To make this passive, you'll need to use the verb to be in the present simple (am, are, is) plus the past parciple of the main verb.
To say who did the action, you can use the proposition by.

# data[].attributes.body
The e-lesson I enjoyed the most was definitely e-lesson nº 11, the visit to the British Museum. I am someone who is quite interested in art, so to able to look at some examples was so fun! And I could learn at my own pace, and see in details whatever pieces I wanted to.