Which of these is a supporting service - a service on which ecosystems
depend?
o
a. providing building materials
o
b. raising livestock
o
c. recycling nutrients
o
d. providing national parks

The correct option is C. Recycling nutrients

Explanation:

The nature benefits the humans in numerous ways. The benefits which the environment and all the natural ecosystems present have on humans is termed as ecosystem services. For example, the forest ecosystem is a natural ecosystem that benefits humans in numerous ways including the provision of wood for making houses etc.

Supporting services can be described as an ecosystem service by which essential components or services are continuously provided by the natural ecosystems to the humans. For example, recycling of nutrients.  

the farther away the object is from the central star (the sun) it's gravitainal pull on the object is weaker when it is farther

explanation:

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

explanation: