Choose the correct alternative.Kids believe that thinking up new inventions is quick and easy, ___________ is almost impossible.thatwhosewhatwhich

To determine the correct alternative, let's analyze the sentence:

The sentence discusses the contrast between kids' belief about inventing something new and the reality of how difficult it is. The word following the blank should introduce a clause that explains what is being contrasted with "thinking up new inventions is quick and easy."

Step 1: Analyze the options

1. that - Used to introduce a clause that provides additional information.
2. whose - Used to indicate possession, not appropriate here.
3. what - Used to introduce a statement of fact or question but not fitting in this context.
4. which - Used to introduce a non-restrictive clause, but does not convey the contrast effectively here.

Step 2: Identify the correct connection

The phrase “is almost impossible” describes the difficulty of the actual process of invention, making “that” the best choice to compare and connect the two ideas logically.

Final Answer

The correct alternative is "that." Thus, the complete sentence reads: “Kids believe that thinking up new inventions is quick and easy, that is almost impossible.”