Match the specific actions taken by different YouTube channels to the corresponding strategic pillar for organic growth on YouTube. The strategic pillars are:
- A: Channel Optimization
- B: Content Strategy Alignment
- C: Engagement and Community Building
- D: Video SEO
Actions:
- Action 1: A travel vlogger categorizes videos into playlists such as 'Adventure Travels' and 'City Guides' and updates the channel's visuals to match their travel theme.
- Action 2: A beauty influencer integrates trending makeup hashtags in video titles and descriptions to increase search visibility.
- Action 3: A tech reviewer aligns video content with the latest tech trends and incorporates viewer feedback into video topics.
- Action 4: An educational channel responds to every comment on their videos, fostering a community of learners and encouraging discussions.
Identify the correct strategic pillar for each action.