How to answer these geography questions

The body paragraphs in an informative essay should include clear examples. a thesis statement. restated evidence. a clear direction.

Which of the following is the major contributing factor in all landslides? stream erosion precipitation earthquakes gravity sedimentary layers oriented parallel to the slope

Ineed , i need to create a power point in life science here is a picture explaining a little what the topic is about, me with some information for my slides : (