Help. determain if the thesis statement is strong or weak 1. citys need to take an active role in emproving the saftey of biycleists
2.A bicycle helmet protects the skull
and brain by absorbing shock
during an accident.
3.Bike lanes have proven to be very
effective in improving bike safety
in urban areas.
4.Many bicyclists do not buy
protective headgear, or they
buy a helmet but do not use it.

biking advocates, who ... safety is paramount and who typically wear helmets themselves, ... If you're cruising along on a road bike at 20 mph, hit a rock, and get ... that wearing helmets while cycling reduces the risk of head and brain ... Site Map · Privacy.

Explanation:

Strong thesis: 1 and 3

Weak thesis: 2 and 4

Explanation:

2 is a fact, 4 is weak, 1 and 3 are not facts and can be discussed

I am 100 % sure.

do you want me to proof read it?