B Which of the following will exert the greatest pressure when standing on the ground?
A an elephant: weight 50 000 N, area of one foot 0.2 m2
B atmospheric pressure: 105 Pa
C ballerina: weight 450 N, on one point, area 0.0015 m2
D man: weight 800 N, area of one foot 0.025 m2

3is a crest4 is a trough 2 is the amplitude 1 is the wavelength

answer and explanation;

composition refers to both the types of minerals within a rock and the overall chemical makeup of the rock while texture refers to the size and arrangement of the minerals or grains that make up a rock. both composition and texture can be used to classify rocks, such as igneous rocks. texture describes how the rock became solid or crystallized from liquid, melted rock. composition of a rock describes the minerals that make up a particular rock.

The answer is b hope this