Which network has already purchased the rights to the 2014, 2016, 2018, and 2020 Olympic games?

Mark presented a speech on the Lighthouse of Alexandria. His first visual is a slide of the Lighthouse

During his presentation he said, "This is the Lighthouse of Alexandria." This is an effective integration and presentation of a visual Indicate whether the statement is true or false

Subjects that are remote from the audience's personal experience, require technical knowledge or some other kind of special expertise, or are bound up with many other difficult issues are what form of subject-related challenge?

What will be an ideal response?