These lines are called cross-contour lines.
Cross-contour lines are used in making nice pieces of art but most importantly they are a huge helping tool. These cross-contour lines can help people understand the solid form and the appearance of object from different perspectives and vantage points. Thus they are invaluable learning tool.
The stage of Piaget's Theory of Cognitive Development that corresponds with adolescence is the “Formal Operational Stage” (ages 11 or 12 and above) wherein abstract thinking, deductive reasoning, and logic increase.
Because there wasn't enough water or rain to grow certain type of crops that require a certain amount of water that they did not have.
Answer:
how your body work
how we live in proper manner
what is wrong and right
and service is also included
