A)by providing water for irrigation and restoring trees to areas where forests once existed
The correct answer to this open question is the following.
Although options are not included in this question, we can answer the following.
The important change in the Sun over the past four billion years is thought to be very important to understanding the climates of Venus, Earth, and Mars is "a gradual brightening with time."
Our solar system is wonderful. The Sun exerts a key influence on the planets that orbit the Sun. Solar flares create a great impact on the closer planets, including planet Earth. Our relationship with the Sun is absolute. Indeed, life on planet Earth depends on the Sun. Sun rays along one year determine the weather, among other factors on Earth, as well as the Sun and its gradual brightening with time, which has impacted the climate of Venus, and Mars.
Answer:
people form political units such as countries of states to make governing more effective.
Answer:Explained below
Explanation:
Warmth is received from sun and is received by our thermal receptors .Heat from sun will stimulate our thermal receptor by warming the receptive field of thermoreceptors which create the heat potential .This signals are transferred to brain via neurons to your brain and finally brain analyse the signals of getting heat.
I'm going to assume you meant poles for this. The lines that meet at the North and South Poles are called Longitude. How I like to remember that is Lat is relaxing and Long is tall. :)
