Comparative and experimental investigations are two of three scientific investigations, the other is descriptive investigations.
--hope this helps--
The competition and threat for purple sea star when sea stars gets eaten by sharks it is basically dangerous the will need help when sea stars live in oceans the will be near others as well
An open flame or burning flame
Answer:
An individual may vocalize to others in their population to establish nesting place.
Explanation:
Animals can make different means to compete with others. However, the most noticeable way is to vocalize. This warns others to bake off, and leave them alone.
