What are the lifestyle changes that help one to relieve from depression?

Which are the various ways that help us to relieve stress ?

What are the measures one has to take to prevent from contracting STDs ?

What is Inbreeding depression?

What is artifical changes? Give example.

Suppose you are shooting an arrow from the top of a building at an height of 6 m to a target on the ground at an angle of depression of 60^(@) . What is the distance between you and the object?

What is help area?

A spring compressed by 10 cm develops a restoring force of 10 N.A body of mass 9 kg is placed on it . What is the force constant of the spring ? What is the depression in the spring under the weight of the body? What is the period of oscillation if the body is disturbed from its equilibrium position?

Prepare a chart showing the food items which are preferable and which should be avoided to prevent high blood pressure and heart disease. Apart from diet what are the other lifestyle modifications to be followed to manage this condition.

What are bulliform cells ? How it helps the plants ?