Paano nagkaiba at nagkatulad ang tatlong sinaunang kabihasnan sa Asya sa kanilang lugar na pinagsimulan at uri ng pamumuhay?

Facial shaving brushes are either bulb-shaped or fan-shaped. an experiment is to be conducted to determine whether the lather thickness is the same for both types of shaving brushes. in previous studies, it was determined that shaving brush size (small, medium, large) is associated with lather thickness, but shaving brush type (wolf whiskers, maggard razors, frank shaving, and so on) is not associated with lather thickness. how could the experiment best be conducted? by blocking on shaving brush size by blocking on shaving brush type by blocking on shaving brush shape by blocking on lather thickness without blocking

In 2004 how many nightly car accidents were there

And intervening opportunity is an example of