Which meaning of the word approve is used in the following sentence?

Even though the seventh grade class had never taken an overnight field trip before, the principal decided to approve Mr. Juarez’s request to take his students to the beach for two days to study whales.

give official permission.

Explanation:

The word "approve" is used to refer to when someone agrees with other's opinions or ideas. It is an expression of favoring something.

The word "approve" is a verb and has been used in the given sentence to show that the principal confirmed with the idea or request of Mr. Juarez of taking the students to the beach for two days study of whales.

The word "approve" has been used to refer that the principal has sanctioned officially the request of Mr. Juarez.

So, the correct answer is 'give official permission.'

invention of the washing machine

in the past, people used sticks and stones or scrub boards to clean their clothing. as it was sweaty, backbreaking work, we owe a world of to james king because he created the model for the modern washing machine in 1851. the most important issue was that this machine cleaned clothes while a person cranked the handle. doing this made people who used it develop strong muscles in their arms. later, in 1908, alva j. fisher created an electric washing machine named thor. this one was not the first automatic washing machine. however, it was one of the most popular models at the time.

b is the answer