Movie production and marketing techniques began to shift in the 1970s, with studios investing more money in fewer films in the hopes of producing

Blockbusters

Explanation:

A blockbuster represents an entertainment piece such as movies that are both financially successful and highly popular among people. To create a blockbuster, movie producers and studios will usually dedicate time and large amount of resources as well as elaborate marketing strategies to movies with the hope that the financial outcome will be large enough to offset the budget.

Investing in blockbusters are expensive so they necessitated the production of less quantity of films and concentration on producing blockbusters.

While the term blockbusters came in the 1940s, it was around 1975 after the Movie "Jaws' by Steven Spielberg that the word became more popular and widely adopted. It was followed by large franchises like Star Wars and Aliens among several others.

d) social security number

let me know if i am correct or not, so i can edit the answer.

muslims control the north africa during the period of 1500 up

to 1800. they made a barrier to prevent further european exploration from

entering the africa from the north. however, the dutch ware still able to move

toward the interior with having south africa as one of the routes leading to

the east for trading with asia.