The right approaches to population monitoring methods of swallows and tortoises are point counts and line-transect distance sampling, respectively.
For point counts, In order to collect the data required to meet the current study's objectives, one must use field techniques methods for selection, counting, capturing, observing, measuring, and marking individuals chosen from the targeted population.
To count or keep track of the birds of the air, point counts are a frequent field technique (birds).
The practice involves making observations over a predetermined, set amount of time and keeping track of the number of birds coming from a specific location.
While the line-transect distance sampling methods in the field are useful for keeping track of the number of tortoises and is appropriate for controlling and tracking the population.
B. Asbestos was used in housing for many years because it was cheap to manufacture and was amazingly heat-resistant, but was found to be incredibly dangerous, causing innumerous accounts of lung cancer and related problems.
This is from memory, but I will double check after I answer.
