Answer:
Option A. can reproduce by budding.
Explanation:
Sponges is a multicellular organism which consists of pores that allows water to move through the body. Sponges belongs to kingdom animalia and phylum porifera. Sponges can reproduce by budding. Sponges are placed in kingdom animalia because they are unable to make their own food, made of more than one cell and absence of cell wall.
The independent variable controls the dependent variables.
The correct answer is - predator species in a community.
In the terrestrial ecosystems, a very good and usually sure predictor of the biodiversity is the existence of a predator species. The more predator species there are, the higher the biodiversity, and vice versa, the less predator species, the lesser the biodiversity.
The reason why the predators are such a good predictor of the biodiversity is that they are the species that are on the top of the food chain. That means that the predators are dependent for their survival on all the other species bellow them in the food chain, which is pretty much all species apart from themselves.
If a predator is present, than there has to be pray. If there's pray, omnivores and herbivores, than there has to be plants. All of the organisms are connected to one another, and the ones on the top of the food chain are the most dependent on the others, thus their existence usually means a healthy ecosystem with higher biodiversity.
B. Scarcity of drinking water
