Which of the following statements is true?
a. biotic factors are nonliving components of an ecosystem.
b. abiotic factors are living components of an ecosystem.
c. the available space in an ecosystem is an abiotic limiting factor.
d. the available water supply in an ecosystem is a biotic limiting factor.

Average annual precipitation and are the two major features that define the biomes on earth.

7. describe two strategies that parents can use to cope with stress. 8. describe the three types of childcare available to families. 9. what can parents do to be more involved in their children's education at home and at school? 10. which factors should a parent consider when choosing a childcare option?

Select the word from the list that best fits the definition a system made of 25 satellites