Used to talk to people, chat with people on mobile.
Answer:
The correct answers are c. can contain special characters d. is case-sensitive
Explanation:
Variable can be referred to as a container used for storing values such as numeric values, memory addresses, characters, character string so it can be used in any part of the program. Every programming language has rules that you must strictly follow while naming a variable, and some of the rules for naming variable in PHP are A variable name can contain letters, numbers, and characters after the first character and A variable name is case sensitive.
The receiver of an e-mail message.
The Exhaust stroke.
The exhaust stroke is the final stroke of the four-stroke cycle engine. It occurs when the stroke valve is open and the intake valve is closed as can be seen in the picture above. The piston in this stage moves upwards from BDC to TDC. The exhaust valve opens other moving parts like the wheel which pushes the piston back to TDC. This action emits the spent air-fuel mixture through the exhaust valve.
