{science question} (#3.) photosynthesis
if photosynthesis and cellular respiration form a cycle, why do plants need to continually take in carbon dioxide, oxygen, and water from the environment?

Plants release excess oxygen, carbon dioxide, and water back into the environment. They don’t store them indefinitely. So, they continually need to take in these elements.

Explanation:

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.  

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of c is as shown here in the image.