Which control structure will execute an instruction only after the computer evaluates conditions to determine if a certain condition exists?

Which type of programming structure requires each instruction to be performed in order, with no possibility of skipping an action or branching off to another action?

Jackson has written a section of code in his program that instructs a character to move forward unless it encounters an obstacle, such as a rock. If the character encounters an obstacle, then it should change direction before moving forward again. If it does not encounter an obstacle, it should continue moving forward. Which type of control structure has Jackson written?

What type of flowchart is shown here?

What type of flowchart is shown here?

What is the Output if the user enters:
Yes

What is the Output if the temperature is:
19