Because, like shaking your head yes or no, it is understood by everyone, regardless of region or country.
by size, shape and composition?
4.54 billion years<span>The "best" age for the Earth is based on the time required for the lead isotopes in four very old lead ores (galena) to have evolved from the composition of lead at the time the Solar System formed, as recorded in the Canyon Diablo iron meteorite. This "model lead age" is <span>4.54 billion years</span></span>
The only country that boarders both Israel and Libya is Egypt
The right answer is : a, sorry for the mistake