Which of the following is a social media optimization technique that can aid in search...

Linking social media posts back to the company's website is a key social media optimization technique that supports search engine optimization (SEO). These backlinks help increase the website's visibility and authority, as search engines consider the quality and quantity of inbound links when ranking sites. By consistently driving traffic from social media to the website, the brand can improve its search engine rankings, attract more visitors, and potentially increase conversions.

References:

"The Ultimate Guide to Social Media SEO," Hootsuite Blog.

"Social Media and SEO: How Social Media Can Help Your SEO Strategy," Moz.