Answer:
B. Cause and effect
Explanation:
The given paragraph is structured as a <em>cause and effect</em> paragraph. This type of paragraph explains why something happens. The occurrence that takes place is defined as the effect and the thing that causes it is the cause.
Here, we have two groups of students who perceived the same lecture in two completely different ways. This is the effect. What caused this is the way the lecturer was introduced. The students' expectations (cause) affected their opinion on the lecture, the final result (effect).
I would go with B, or Ways to build immunity to diseases. Why? Well, just by using the word biology, we can use process of elimination. The prefix “bio” means life, so C and D already would be out. The suffix “ology” means the study of, so the word biology means the study of life. Because biology often has to do with diseases and finding cures to sustain human life spans, the only logical answer would be B. A would make no sense in terms of biology.
Excitement
Herbert's victory at chess against his father
sinister
The chess game is very tense. Father and son duel and the Father even tries tactic to distract his son from noticing his error. After the son check mates his father, the Father becomes grumpy.
First add the whole numbers.
Then find the LCM (least common multiple) of 3 and 2, which are the denominators of both fractions. In this case, the LCM of 3 and 2 are 6.
As you can see in the photo, I multiplied a number than can result in 6 in both denominators. Then multiply that same number to the numerators.
Finally, add 21+2, but keep the denominator as 6.
This is how I learned it, hope it helps.