Giving 50 points for one question PLZ help fast for a test due in 20 min and this is the only one I don't know! Two planets are orbiting a star. Planet A is closer to the star than Planet B. Which description explains the expected motion of Planets A and B?

Planet B orbits faster than Planet A.
Planet B has a shorter orbital period than Planet A.
Planet A orbits faster than Planet B.
Planet A has an equal orbital period to Planet B.

1) earth's crust is made up of relatively rigid plates that ride atop earth's hot, semiliquid mantle. (2) the plates are called tectonic because they're in constant motion. (3) they can move because earth's mantle is a very hot and semiliquid fluid called magma. (4) volcanoes are a result of magma rising up or erupting through a plate, particularly where plate boundaries are moving against each other. (5) also, when plates slide against each other, causing friction along adjacent plate boundaries, earthquakes frequently occur. (6) therefore, we often find volcanoes and earthquakes along plate boundaries. (7) plates may also collide. (8) when that happens, mountain ranges are formed. (9) for example, the collision of the plate carrying the indian subcontinent created the himalayan mountains when it collided with the asian plate. 2. which sentence in this passage introduces a new topic that might begin a new paragraph? a. sentence 5 b. sentence 4 c. sentence 7 d. sentence 6

How was the structure of american society different in 1848 than it has been in 1800

The penalties for a person's second dui conviction include installation of an ignition interlock device for a. no more than two continuous years b. no more than nine continuous months c. no less than one continuous year d. a and c