Answer:
A). dissolved into other substances
Explanation:
Process of elimination-
B) loss of protons-mechanical reaction
D) reorganized into different substances-physical reaction

Last option: Preserve an ecosystem

• The establishment of a bird reservation is a way to preserve an ecosystem because reservation provides suitable environment to organism. A healthy ecosystem means large number of biodiversity.
Answer:
a tea bag in water
Explanation:
a tea bag place in a cup of hot water will defuse into the water
It reproduces both sexually and asexually.. sexually both male and female release sperms and eggs in water ,after fertilization it forms planula which then asexually reproduce either by budding or strobilization..