Answer:
C) The Marianas, Oregon and Washington have had the sea floor bent downward by subduction to make trenches, the trench off Oregon and Washington is filled by sediment eroded from the nearby continent, but the Marianas don't have a nearby continent and so the trench there is not filled with sediment.
The Canadian province that did not ratify the Canadian constitution act after Canada gained complete independence was Quebec. Historically Quebec has been a French territory, unlike the other Canadian provinces that were English territories. The different backgrounds, relations and cultural differences, as well as Quebec's ambition to become a separate country, were all reasons for this province to not ratify the Canadian constitution act.
Answer:
drought Is a prolonged dry period in the natural climate cycle that can occur anywhere in the world.
An ecosystem comprises the physical environment.
It is an interlinked system with the plants and animals living therein linked to each other.
Ecosystems have evolved over a period of thousands of years.
Some examples of interlinking are
(i) Insects help in pollination of crops and fruit trees. Some insects also exert biological control on harmful insects.
(ii) Carnivorous animals kill herbivorous animals for food and herbivorous animals consume plants for food.
(iii) Decomposers like fungi and bacteria fertilise the soil with humus by decomposing dead animals and plants to enable plants to grow. There are many such examples of interlinking to show that every species has a role to play in the ecosystem.
Thus, we can conclude that every species has a role to play in the ecosystem
