('I like to sky dive also')
Not me! I have plenty of things to do that do not require me to trust the... person who packed the parachute, or whatever...
You don't have to worry about what they mean. The purpose of this instruction is to prevent people from writing only a sentence or two. At essayforum, we hope people will respond to essays in a full paragraph, too.
So... start with a topic sentence, followed by a sentence to explain the topic sentence a little more... then a sentence with an example or maybe a quotation... then another sentence to tell the significance of it all... finally a conclusion/transition sentence to complete the thought.
(The last sentence of a para can reflect on why it is important, or it can tell how it is related to the subject you are going to write about in the next para.
Just start with a single sentence!!