While preparing for his travels to the middle east, waldo reads that the most common physical feature in the middle east is tropical rain forest. is waldo's information.

ww1 weapons: tank. tanks were used for the first time in the first world war at the battle of the somme. they were developed to cope with the conditions on the western front. the first tank was called 'little willie' and needed a crew of 3.

the correct answer is a