There are two types of factors facing African Savanna Environment:
Biotic factors- A living thing, as an animal or plant, that influences or
affects an ecosystem
<span>Abiotic factors- A non-living condition or thing, as climate or habitat
that influences or affects an ecosystem </span>
and the organisms in it.
<span>List of Biotic Factors in a
Savanna:
</span>
1. Hoofed animals such as zebras and
antelope
2. Carnivores such as lions and other cats
3. Herbivores such as elephants and
rhinos
4. Grasses such as Elephant Grass
and Bermuda grass
5. Bacteria and viruses
6. Fungai
7. Bushes
8. Trees such as Jackal berry
tree
9. Plants such as Senegal gum Acacia
10. Birds such as African Spoonbill.
List of Abiotic Factors in a Savanna :
1. Solar energy from the sun
2. Light from the sun
3. Climate and temperature
4. Wind, rain, and other weather
5. Fires
6. Oxygen and other gasses in the
atmosphere
7. Soil and everything in it
8. Pollution
9. Earthquakes and other natural
disaters
<span>10. Water</span>
I believe the answer is: Threshold
In communication process, volume threshold refers to the bare minimum of volume power that needed for a message to be transferred from one person to another. The threshold within communication mainly influenced by two factors, the voice volume of the sender and the noise level within the environment surrounding the communicators.
Maybe if you would show the whole question.
Your answer would be A. Hope this helps!