Another purpose of parentheses is to show that a word could be .

a. of another origin
b. singular or plural
c. formal or informal
d. past or present tense

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. which statement about this paragraph is accurate?

What is most likely nelson mandela's purpose of using third person point of view after introducing himself in his introductory paragraphs

Which underlined word in the sentence is a demonstrative adjective? these brown shoes fit my feet very well.