A diary or autobiography are
examples of this type of resource
The best kind
Tertiary
Secondary
Primary

The correct answer is Primary

Explanation:

In both diaries and autobiographies, the author describes his/her experiences. This means in both sources the events are directly described by the person who lives them. This distinctive feature makes both texts to be primary sources or first-hand accounts. Moreover, this type of source differs from secondary or tertiary sources because in this the author did not experience the events but only writes a new text based on other sources. For example, if the diary is summarized, the summary is a secondary source.

the correct answer is 2.

a slump in geology means a mass movement process of slope failure. a mass of rock or unconsolidated material drops along a slip surface. in other words, rock layers move a short distance down the slope. the slump block is an intact block (2), without any landslide material.

in this image, 1 is the surface of rapture (scarp), 2 the slump block, 3 main scarp (crown), 4 base of rapture with debris flow.

slumps are caused by clear cutting on unstable soils and the sagging of earth, in coastal areas they are due to wave infiltration.

b) to encourage free trade