Question

some easy questions.
But don't do spam##
science question
it's "BIRDS IN THE SKY " chapter
1) Explain how a streamlined body helps birds to fly ?
2) What are the raw materials used by birds to build their nest?How do they collect this raw materials? Also,find out how they use these raw materials to build their nest.
it's "GIFTS OF NATURE"chapter
1) Is water a renewable or non-renewable resources? Is drinkming water a renewable or non-renewable resources? Give reason for your answer.
2) Explain how increase in population is directly correlated with environmental pollution.
PLS ANSWER IT
I WILL MARK THE BEST ANSWER AS BRAINLIEST.☺☺

Answer 1

(1) It occurs when the fluid closest to the object sticks to its surface, exerting a force that opposes the object's motion. Many animals, such as birds and dolphins, and many machines, such as airplanes and submarines, have streamlined bodies to reduce friction drag as they move through either air or water.

(1)Water has been considered an exploitable and renewable resource from the beginning of civilization, but we have been creating limits to the water supply and reducing the natural renewal processes for even longer. We are now facing growing shortages of water for drinking, crop irrigation and sanitation, such that hundreds of millions of people are constrained in non-essential water uses like bathing and landscaping.

(2)The interactions between human population dynamics and the environment have often been viewed mechanistically. This review elucidates the complexities and contextual specificities of population-environment relationships in a number of domains. It explores the ways in which demographers and other social scientists have sought to understand the relationships among a full range of population dynamics (e.g., population size, growth, density, age and sex composition, migration, urbanization, vital rates) and environmental changes.