It’s a verb and it means encourage or stir up (violent or unlawful behavior)
The answer B.Since,Diffusion is driven by differences in concentration. When chemical substances such as perfume are let loose in a room, their particles mix with the particles of air. ... Diffusion in gases is quick because the particles in a gas move quickly. It happens even faster in hot gases because the particles of gas move faster.
B. Intensive pronouns
In this case, the pronoun "himself" is right after the noun, so it is intensive. If the pronoun was after the verb, then it would have been reflexive.
In 1863 Abraham Lincoln signed the Emancipation Proclamation to free the slaves. He is the "great American" in whose "symbolic shadow" the attendees of King's address literally stand on the grounds before the Lincoln Monument in Washington DC, in August of 1963. However, Dr. King's reference is somewhat ironic, here, as he goes on to emphasize that precisely one hundred years later, black people remain, by any measure of equality, fundamentally not free, not free to vote, not free to peaceably assemble, not free from violence. While Lincoln's decree became "a beacon of hope" for African Americans, they exist still within the shadow of injustice and continued oppression. Further, assembled on the grounds of the nation's capital, it is manifestly apparent that the promises signified by this city designed (In part by black architect, Benjamin Banneker) as a series of monuments celebrating democracy, have not been delivered to black Americans. They have no political "capital" in this place, and they have come, in part, to reclaim and "cash the check" that came back marked "insufficient funds" on the promise of equality established by the Declaration of Independence and the Constitution.
