Please explain

The following ACF plot shows (the dotted line is the statistical threshold, inside the dotted line can be viewed as no statistically significant relationship) 0.0 0.1 0.2 0.3 0.4 0.5 -0.2 5 10 15 20 Lag Positive lag-1 shows stickiness of the time series O Positive lag-1 shows swings of the time series O Negative lag-9 shows swings of the time series O This ACF shows seasonality pattern of every 4 periods O This ACF shows seasonality pattern of every 6 periods