Question

parts of an intro paragraph

Answer 1

An introduction includes:-

- A grabbing sentence: Grabs the readers attention, must be interesting. 
- A thesis sentence: Gives a conclusion and sums up the main points of an essay. 

Answer 2

the first sentence is a describing sentence. a example is (the topic is saving whales):
Today whales are going extinct. We need to fix that! the 2nd sentence is detailed. the 3rd a grabbing sentence.