Some plant species release chemicals into the soil that end up killing nearby plants. this is an example of what? competition, cooperation, mutualism, working together

The answer is Competition.

Explanation:

Competition is a biological interaction between living beings in which the biological adequacy of one is reduced as a result of the presence of the other, this may be because there is a limitation of the amount of at least one resource used by both organisms or species; such as food, water, territory, couples.

answer: option (b) is the correct answer.

explanation:

a covalent bond is formed by sharing of electrons. whereas polarity arises due to difference in electronegativity of two atoms.

therefore, more is the electronegativity of an atom which combines with the titanium, more readily it will induce a partial positive and negative charge.

thus, out of the given options fluorine is most electronegative and has an incomplete octet. therefore, it will readily combine with titanium to share the electrons and complete its octet.  

the answer is barium and copper bromide