Which of the following are activity patterns? a. saving c. producing b. investing d. all of the above

d. all the above

Explanation:

All of those can be activities when it comes to activity patterns in economy. You must invest to produce, you must produce to profit, and you must save the profit to invest. This is a cyclical example, but it fits perfectly with the choices provided, creating a constant pattern of making money to make money.

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.

not really sure i needed the points. sorry