3. Which statement concerning an ecosystem is correct? A) It can exist with or without a constant source of
energy input.
B) It must contain consumers but can exist without
producers.
C) It involves interactions between biotic and
abiotic factors.
D) It can exist on land, but it cannot exist in lakes,
rivers, or oceans.

C) It involves interactions between biotic and

abiotic factors.

Explanation:

Ecosystems need energy imput, need both consumers and producers, and can exist on land, lakes, rivers and oceans.

the transfer for conduction is the heat transfering from the liquid to the spoon

the transfer for convection is the heat rising from the liquid to the air

the transfer for radiation is the heat going through the sides of the cup and to the air

at least that is what i would do