Answer:
D. unnatural scream
Explanation:
The Bigfoot is a an animal around there's lot of debate, as there are thousands of sightings, but not conclusive proof that it actually exists, thus it falls into the category of mythological creatures for the time being. This creature has been described by thousands of people that claim to have seen it or hear it, and the descriptions are pretty much the same, very tall, hominid-like, bipedal, dark fur, very quick, and terrifying. Something else that is a specific feature of the creature is the sounds its make, as everyone has said that it produces incredibly powerful unnatural sounding scream. People have said that they have frozen from fear after hearing those sounds, and that whenever that sound occurs all other animals run away frightened in the opposite direction.
Organisms that produce their own energy or "food" are known as autotrophs.
Answer:
Both algae and phytoplankton
Explanation:
In the aquatic ecosystems, both algae and phytoplankton are producers and on land, plants are the primary producers.
The primary producers provides food for the whole ecosystem.
- During photosynthesis these producers are able to take up inorganic compounds and synthesize organic molecules.
- They use carbon dioxide and water in the presence of sunlight to produce glucose and oxygen gas
- The glucose is the food on which the ecosystem depends on
- Algae and phytoplankton produces food this way too.
