Option 1 – Certain organisms may compete for vital resources

This phenomenon is true because of dependence of 2 or 3 different types of organisms on the same resources such as – cactuses and sage depend on the same raw materials, Desert rats, Grasshoppers, Molds, bacteria and yeasts depending on sage, etc.

Option 4 – 4

The populations with the highest percentage of variation for a given trait are likely to survive most environmental changes.

Option 1 – number of autotrophs

Biotic factors are related to life or living factors. Plants, animals, fungi, protist and bacteria are all biotic or living factors.

Organisms which are able to make their own food (in the form of sugar) by using sunlight are called autotrophs.

Temperature, salt content and pH of water are non living factors of the ocean ecosystem.

Option 3 - Energy
Energy is produced when one component such as water is converted into another form such as hydrogen and oxygen. Energy can be utilized, but cannot be stored. Hence, it cannot be recycled.

Option 2 - Rabbit
In this food web, the Mouse and Rabbits are dependent on the same food – Berry Bushes. Hence, increase in the Mouse population will lead to an imbalance and competition for food between the Rabbits and Mice.

Option 2 – Ecological Succession

Ecological succession is the gradual process by which ecosystems change and develop over time. Within any community some species may become less abundant over some time interval, or they may even vanish from the ecosystem altogether. Similarly, over some time interval, other species within the community may become more abundant, or new species may even invade into the community from adjacent ecosystems. This observed change over time in what is living in a particular ecosystem is "ecological succession".

Option 1 – decrease available habitats

Industrialization leads to increase in pollution, hence increasing global warming.

Industrialization is one of the parts in an ecosystem but, is not an element of stabilization.

Industrialization alone cannot lead to an increase in the carrying capacity of a native species in an ecosystem.

Carrying capacity refers to the number of individuals who can be supported in a given area within natural resource limits, and without degrading the natural social, cultural and economic environment for present and future generation

Option 3 – Development of equipment that uses solar energy to charge batteries

Sun light is the best natural resource that is converted into electricity. Rather than using expensive natural gas, oil, coal or wood for meeting energy requirements, you can save on a huge amount of money and electricity by utilizing the renewable solar energy.

Some of the environmental benefits resulting by the use of solar energy are

• •    Reduced air pollution
• •    Offset of greenhouse gases
• •    Reduced need for other sources of energy