When a teacher uses concrete objects, pictures, models, or materials displayed on the overhead to attract and maintain students' attention, she is attempting to capitalize on which of the following essential teaching skills?
a. review
b. focus
c. feedback
d. organization

Focus

Explanation:

Teacher can use different skills to draw students' attention like pictures, objects in the classroom, models, flashcards, materials displayed on the walls or ob the board. These are called focus skills, so 'Option b' is correct.  

the excerpt from chapter 2 of "animal farm", by george orwell that is an example of foreshadowing is "these three (snowball, napoleon, and squealer) had elaborated old major's teachings into a complete system of thought to which they gave the name of animalism." animal farm is an allegory of how czarist russia developed into communist russia with all its corruption. old major's teachings represent marx's theories turned into communism, animalism, by the three pigs. this foreshadows the oppression and corruption that will follow this revolt.