Answer:
only helium makes balloons go up so the answer is helium
Explanation:
Answer:
The freshwater trout requires a lower salt ions to function.
Explanation:
Answer: D. The succession of community is completed.
Explanation:
A succession can be define as a series of gradual changes that occur in the biotic community of the ecosystem with respect to the changes that occur in the abiotic or non-living factors with respect to time until the ecosystem attains stability.
A climax community is the community that develops in the end of the ecological succession. It is the stable community which does not require any further change to occur. With the development of the climax community the succession completes.
Answer: A decrease in resources and loss of habitat
Explanation:
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